Exported interactive PDF does not honour reading order.
1 – InDesign 2020 15.0
2 – Have standard copy with headings and body copy with PDF export tags applied (H1, H2, P etc). Add images between sections of text. Drag elements into the Articles panel in the correct reading order and tick 'Use for Reading Order in Tagged PDF.
3 – Images should be in the right order
4 – Images are not in the right order. All figures are in a <Art> tag. This was not an issue in InDesign 2019.
5 – Order should be first block of text, image (1) and then second block of text with an anchored image (2). Result (in second screenshot) is first block of text, second block of text and the anchored image, THEN image 1.
Fix for this issue is now available in the latest update of InDesign 2020 – that is, InDesign 15.0.1
In the Creative Cloud Desktop application, click on the Updates section on the left. You should be able to see the Update available for InDesign. Please update your InDesign application to this version to try out the fix.
Let us know in the comments section if you face any problem with the updation process.
Adobe InDesign Team
Please fix ASAP!