InDesign V 16.4, Current Creative Cloud as of 2021-11-14.
Currently - The top Layer visibility icon (within the layers palette) does not indicate a mixed visibility status of sub layers.
I have a rather complex layer set in a document I'm working on where I have master pages with master pages based on other master pages and linked objects within the document.
I just spent over an hour trying to locate a hidden object. I incorrectly assumed that, when looking at the layers palette, with all the layer stacks closed (layer list contracted where only the top level was shown) that the visibility icon would indicate there was mixed visibility of all layers within that stack or they would all be visible or all would be off.
When a layer is visible you have an eye icon showing. If the layer is not visible there is nothing. If the layer has sub layers where some are visible and some are hidden each level above and within the same layer stack should have an icon like an eye with a cross out or an X, Therefore when the layer stack is closed you know some of it's sub layers may be visible and some maybe hidden. When the top layer visibility is toggled there are indications for the lower levels as to there independent status and that is great but it should work in reverse as well.
This concept should also be carried out on the locking toggle as well.

Provide a font file with the Document fonts folder for a placed SVG graphic where the font is not embedded.
RESULT: InDesign will not use the font for rendering text with the placed SVG graphic.

ALSO: Even if the font is installed for ALL USERS in the system on Windows 10 InDesign will not package the font that is needed with the placed SVG graphic.

One cannot be sure what fonts are needed with placed SVG graphics. When InDesign documents are saved, closed and re-opened, Preflight and Type > Find Fonts… will not show them.

The only check you can do:
Export the document to IDML. Open the IDML file as document.
Then Preflight will show a needed font inside a placed SVG graphic and Preflight could flag it if it is missing.

Well: The missing font installed in the Documents fonts folder could even block InDesign to access the same font that is installed for all users with:
C:\WINDOWS\Fonts\

To solve the issue you have to do THREE things:
[1] Move the needed font for the placed SVG file out of the Document fonts folder
[2] Install the font for ALL USERS
[3] Quit and restart InDesign, only then open the document again. Otherwise you get a situation where the font could show as missing if it used in a text frame elsewhere in the document like [Lemon], but is rendered correctly in a text frame. And still rendered substituted with Arial in the placed SVG graphic. See screenshot: "NoAccessToFont-EvenWhenInstalledFor-AllUsers.JPG" in my test files one can download from my Dropbox account:

SVG-from-AI-Placed-16.4.0.51-DocumentFontsFolder.zip

https://www.dropbox.com/s/jjsjrsf2n5k81v0/SVG-from-AI-Placed-16.4.0.51-DocumentFontsFolder.zip?dl=1

Regards,
Uwe Laubender
( ACP )

This bug seems to only affect older InDesign documents and graphic elements from them that were created before the update to 16.2.1. The bug can NOT be reproduced in completely new 16.2.1 documents with newly created elements!

What happens:
For example, if you create a circle with the dimensions 200X200mm and a 10mm thick outline, this results in a circle with the dimensions
210X210mm

But if you now change the contour orientation from center to inside, the dimensions change unproportionally in height:

Instead of 200 x 200 mm the circle becomes quasi
an "egg" 200 x 199.999 mm

If you now set the contour to 8mm, the element becomes proportional again.
However: if the contour orientation is now changed again from
"Aligned inside" to "Aligned outside", a conversion error happens again.

Instead of the dimensions 216 x 216 mm
the dimensions are now 216 x 215.999 mm.

In these cases, the dimensions cannot be corrected by direct input in the control palette or by clicking on the arrow keys!!!!!

If you enter 216 mm via direct input, 215.999 mm stubbornly appears.
If you click on the arrow keys, nothing happens in the height value! But if you change the width value now, if you have coupled the proportions (by means of the lock)
from 216 mm
to 216.001 mm
and with each desperate click further 216.002 mm;
and further. ...,003/...,004 !!!!

Very very annoying!!!!!!!! We are the BORG! Resistance is futile!

ATTENTION.
This rounding error also occurs with proportional scaling with the selection tool and can be transported via copy and paste even into completely new created InDesign(16.2.1) documents. Great. Or!?

As I said: In newly created documents with newly created graphics in Indesign 16.2.1 the bug cannot be reproduced. At least not so far ...

Unfortunately, this means for already existing documents from previous Indesign versions, - also because the bug can be scaled - , watch out like ****!

Keep your nerves! Even if it is colossally annoying!!!

Well! At least the other contour bug is fixed now.
Instead we have a new one!

Really super ...
is not this!

Translated with www.DeepL.com/Translator (free version)

Scaling with undesirable erroneous result:
Affects frames whose outline is either:
A. centered or
B. aligned to the outside of the frame
(Frames where the contour is aligned on the inside of the frame are not affected by this error. There the scaling still works correctly as desired).

Recently, such frames (with a contour A/B) shift into each other undesirably after simultaneous resizing (see screenshot) and lose their original arrangement to each other!

I don't know with which version this new bug appeared,
but it is annoying and makes work slower again.

With Illustrator the error does not occur. There it still work as before also with Indesign!

Please Adobe quickly correct. To correct that manually, whether with illus with lines or picture frames costs unnecessarily much time and can also quickly lead to errors in final artwork!