When we open old indd files, the incorporated vector graphics are distorted (even if the wire view is correct).
Copy Paste make the deformation permanent.
Importing original illustrator graphics in the doc works.

This is a very important issue as we often rework/update packs for our customers, and massive production could be trashed if the default is not seen immediately.

Trust in the tools is very important: we have no time/budget to recheck that everything is still perfect when changing a typo or ref somewhere else in the file.