Annotations in snapshot of website get lost when moving tab between windows


I just found out the hard way that annotations to snapshots of websites obviously don't get saved correctly.

What I did:
1. Save snapshot of website
2. Open snapshot
3. Use Zotero's annotation tools to highlight text or add comments
4. Move tab with snapshot to another window
----- so far annotations still are preserved ------
----- but the annotations toolbar is missing ------
5. Close tab with snapshot
----- now annotations are lost ------
6. Open snapthot from Zotero

What did I expect:
Previously added annotations should be in the snapshot

What happened:
Annotations were lost (unfortunately quite a lot of work).

If it is not possible to save the state of annotations when moving tabs between windows, at least a warning would be great!

Keep up the good work!
Best regards
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