Restart in Troubleshooting Mode (Help → "Restart in Troubleshooting Mode…”), which temporarily disables all plugins. If that fixes it, you'll need to identify the plugin that's causing it and then report the problem to the plugin's developer.
If it doesn't, what exactly do you mean by "when I move"?
If it doesn't, what exactly do you mean by "when I move"?
https://s3.amazonaws.com/zotero.org/images/forums/u265723/j9w241b8s8helym8aqo6.png
See this earlier report for example: https://forums.zotero.org/discussion/110348/bug-page-snapshot
Zotero 7.0.11-beta.9+0a6095322 (64-bit) in Troubleshooting Mode
Windows 10