Just updated to ID 2020 15.1 and found a bug which makes the program unusable forcing me to immediately downgrade.
When I open on of my ID documents created in previous version of ID, all of my defined text variables as well as page numbers are corrupted and replaced by the "ss" text. Changing the style has no effect. I can create page number based on the 'Basic Paragraph' style but when i choose any other previously created style, the number changes to 'ss'.
Even the variable field preview shows 'ss' text instead of variable name.
The same document opens in ID 2020 15.0.3 without any problems.

Hi developers,
this is a longstanding bug:

With facing pages documents on EVERY document page there is a zone where jumping of objects will happen.

I call this the jump zone. All objects on a page that will jump are clearly inside the page's area. The bug has nothing to do with rounding errors where object edges are at the edge of a page.

The objects should not move if pages are added or removed, if numbering of pages is changing. Nevertheless they do. Always. Unless, the zone has a width of zero.

Below all the details.

What is a jump zone?
If horizontal values for left and right margins differ, there is a BUG that in effect forms a zone on the page.
I call this zone JUMP ZONE because objects that touch the zone with their edges could jump horizontally.

When will objects jump?
1. When a left-hand page becomes a right-hand page OR a right-hand page becomes a left-hand page.

1. When a left-hand page becomes a right-hand page and later when a right-hand page becomes a left-hand page again.

This could happen within a single InDesign document open.

WARNING:
It could even happen to InDesign documents that are not visibly open.
That's with InDesign documents that are part of a InDesign book file.
The book file's feature with auto-numbering pages can do this even if no document is visibly open.
The damage is done if auto-numbering took place AND the book file is saved.

How large is the jump zone?
The height of the zone is the height of the page.
The width of the zone can be calculated:
inner margin MINUS outer margin

How large is the jump?
The width of the jump zone.

Where is the jump zone positioned?
Positive value: The zone is at the spine of the page.
Objects that touch the zone jump towards the spine.

Negative value: The zone is at the edge of a page away from the spine.
Objects that touch the zone jump away from spine.

What versions of InDesign are affected?
All versions CC up to InDesign 2020, Mac OS X and Windows.
InDesign CS6, Mac OS X and Windows.

Possibly also InDesign CS5 and CS5.5, Mac OS X and Windows.
I did not test this.

How can I avoid jump zones?
Make right and left margin values the same!

Are there workarounds if I cannot avoid jump zones?

1. Anchor objects
   that touch the jump zone to text frames that do not touch the jump zone.
   Nested objects will not jump if the parent objects are not touching the jump zone.




2. Group an object
   to another one that is touching the top or the bottom edge of the page.
   Tests are showing that objects will not jump if they touch the bottom OR the top of the page.
   ( OR both, bottom and top edges of the page .)

Other things to consider about moving objects?
The following is independently of jump zones:
Objects could move to other pages if their edges touch exactly the horizontal edges on pages in facing pages.
Depending on the version of InDesign this could also happen with objects touching the spine.
Reason: Rounding errors.

What can provoke all this?
1. Add or remove an odd number of pages
so that left-hand pages become right-hand pages and vice versa.

1. Renumber start pages of sections
   so that left-hand pages become right-hand pages and vice versa.

Note:
Every document has at least one section by default.
The start of that section is the first page in the document.

More details at Adobe InDesign Forum:
https://community.adobe.com/t5/indesign/bug-in-book-s-update-numbering-feature/m-p/10774458#M166408

InDesign 2020 documents attached here.
See screenshots and further comments at Adobe InDesign Forum:
https://community.adobe.com/t5/indesign/bug-in-book-s-update-numbering-feature/m-p/10774596#M166420

Download link to all test files on my Dropbox account:
https://www.dropbox.com/s/duov096cu2q481l/Jump-Zones-Explained-Facing-Pages-Documents.zip?dl=0

Regards,
Uwe Laubender

( ACP )

PS: Why does InDesign Uservoice not permit to attach files with suffix .indd ?
Message: "Invalid file type: .indd files not allowed."
Isn't that rather absurd?

Hello,

Latest Indesign CC on Windows 10 64bits.

I have a document, with a master page template applied to all pages in the document. There are master text frames inside the master page template, perfectly aligned with the margins on each left, and right page. In my master page template, I have set up the following margins for left pages :

top : 46pt
bottom : 46pt
outside : 56pt
inside : 46pt

And the right pages margins set up as follow :

top : 46pt
bottom : 46pt
outside : 46pt
inside : 46pt

On the left pages, I have a solid holding the current category / section, so I have set a larger outside margin.

Everything looks good and aligned (text boxes are controled by master pages master text frames) until I delete one page for example, which makes every following right page, a left page, and every left page, a right page.

From this point, in my pages, all text boxes are misaligned to the margins set in the master page template. That is to say that from now on, left pages have text boxes which are the size of right pages text boxes, and right pages text boxes have the size of left pages text boxes.

To fix it, I have to select all my pages, and reapply my master page template to update the text boxes to match the master page's master text frames.

Then, the text frames are finally properly aligned to the margins set in the master page template.

I don't think this is how it should behave. Master text frames should always be synchronized to the master page templates and should not have to be reapplied manually...

I might be using this wrong but I can't figure out an auto fix, and this gets really annoying when you have to fine tune your document, remove some elements, which can makes me delete some pages, which causes this issue.

Any fix ? What about a option to make indesign aware when right pages become left pages, and left pages become right pages, and reapply automatically the master page template to adapt to those changes ?

Am I alone with this issue ?

Thank you

Since the latest update (InDesign 15.1.2) you can no longer change the page numbering to roman numerals or a, b, c etc. When you make a new section and change the style of numbering system - nothing changes. You can also not make a page have a new number - for example change page 10 to page 20, it will remain as page 10. These are very important features of InDesign and need to be fixed as soon as possible.

Step 1 - Menu - Layout - Number & section options
Step 2 - Change page 1 to style 'i, ii, iii, iv ...'
Expected result - pages numbered i, ii, iii etc.
Actual result - no change
Step 3: Change page 11 to page 1
Expected result - page 11 is now labelled as page 11
Actual result - no change

I don't get why the logic of page numbering is that complicaded in InDesign.

imagen you would like to show the number of the current and the previous page on the same page.
You can not simply put those varibles form Markers, saying Current Page Number an Next Page Number on the same page. – That would give you twice the Current Page Number.
Current Solution: You have to write them into two conected Text fields, which are supposed to be ob bouth pages, that you want to put a number on.

here my idea:
Why wouldn't you make a varible that is named Previous Page Number and takes simple the Current Page - 1.
Next Page Number – Current Page + 1.

For those who wants to make crazy things with showing a Page Number from anywhere in the dokument, you could make a new varible called Any Page Number and works the quite the same way Previous and Next Page is working right now.

So that would not make anything posible, that was not possible before, but it would make the use of pages marks easier and mor understandable beginners.

Thanks for considering and i would be glad to hear if there is a good reason to leave it as user unfriendly as it is. :-)