UV Editing proportional editing not working/updating correctly with UV Sync Selection enabled #101220

New Issue

System Information
Operating system: Win10
Graphics card: RTX3080

Blender Version
Broken: 3.3.0 - 3.2 - 3.1
Worked: Haven't gone back to check before that

Short description of error
When proportional editing is enabled WITH CONNECTED ONLY at the same time as UV Sync Selection, there are unintended behaviors occurring. It seems to originate from the Prop. Edit influence not updating correctly.

Exact steps for others to reproduce the error
The update of the prop. edit origin seems to be made when sync is off. If sync is ON, prop. edit will not update the origin of its influence radius.

You can start from a default Blender file.
Use the cube (subdivided for clarity), and go in the UV edit panel.
**1.**Activate proportional editing, with connected only selected. You can edit a vertex to update the influence radius position.
**2.**Activate UV Sync Selection, then move another vertex.
**3.**The new vertex should move, but the impacted vertex for prop. edit will be around the first moved vertex.

In addition to that, I believe that you can "register" many influence radius by repeating the first step while only selecting and moving limited parts of the mesh before activating the sync select.

Let me know if I can provide more information.

**System Information** Operating system: Win10 Graphics card: RTX3080 **Blender Version** Broken: 3.3.0 - 3.2 - 3.1 Worked: Haven't gone back to check before that **Short description of error** When proportional editing is enabled **WITH CONNECTED ONLY** at the same time as UV Sync Selection, there are unintended behaviors occurring. It seems to originate from the Prop. Edit influence not updating correctly. ![image.png](https://archive.blender.org/developer/F13529927/image.png) ![image.png](https://archive.blender.org/developer/F13529935/image.png) **Exact steps for others to reproduce the error** The update of the prop. edit origin seems to be made when sync is off. If sync is ON, prop. edit will not update the origin of its influence radius. You can start from a default Blender file. Use the cube (subdivided for clarity), and go in the UV edit panel. **1.**Activate proportional editing, with connected only selected. You can edit a vertex to update the influence radius position. **2.**Activate UV Sync Selection, then move another vertex. **3.**The new vertex should move, but the impacted vertex for prop. edit will be around the first moved vertex. In addition to that, I believe that you can "register" many influence radius by repeating the first step while only selecting and moving limited parts of the mesh before activating the sync select. ![image.png](https://archive.blender.org/developer/F13530017/image.png) Let me know if I can provide more information.

Added subscriber: @Patnard

Added subscriber: @mano-wii

Changed status from 'Needs Triage' to: 'Confirmed'

Thanks for the report, I can confirm the problem.
It appears to be a regression introduced in 2.90.0.
I'm investigating...

Thanks for the report, I can confirm the problem. It appears to be a regression introduced in 2.90.0. I'm investigating...

This issue was referenced by 331de028ef

This issue was referenced by 331de028ef7dcebb63dd09345b311942d6e22f62

This issue was referenced by 1df58ec540

This issue was referenced by 1df58ec54071cf8f758add66617a11cfb814e6ce

Changed status from 'Confirmed' to: 'Resolved'

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UV Editing proportional editing not working/updating correctly with UV Sync Selection enabled #101220