Weight Transfer Operator target mesh doesn't update when transforming bones #78306

New Issue

System Information
Operating system: Linux-5.3.0-7629-generic-x86_64-with-debian-buster-sid 64 Bits
Graphics card: GeForce RTX 2080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 440.44

Blender Version
Broken: version: 2.90.0 Alpha, branch: master, commit date: 2020-06-21 14:55, hash: f2b5f731d5

Short description of error
After transferring weights to a mesh and then posing the armature to deform that mesh, the mesh stays in place until some other actions that do trigger it to update, such as selecting another bone, mode switching or transforming the mesh object itself. The issue is resolved after saving and reloading the file.
2020-06-26 12-13-44.mp4

Exact steps for others to reproduce the error

Delete all vertex groups from the clothing mesh
Shith select on the armature then body mesh and then clothing mesh
Go to Weigth Paint mode
Reset the rotation of the bone
Weights->Transfer Weights
Operator params:
- Source layers: By Name
- Destination layers: All Layers
Try to rotate a bone.
You need to select another bone to update
weight_transfer_bug.blend

**System Information** Operating system: Linux-5.3.0-7629-generic-x86_64-with-debian-buster-sid 64 Bits Graphics card: GeForce RTX 2080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 440.44 **Blender Version** Broken: version: 2.90.0 Alpha, branch: master, commit date: 2020-06-21 14:55, hash: `f2b5f731d5` **Short description of error** After transferring weights to a mesh and then posing the armature to deform that mesh, the mesh stays in place until some other actions that do trigger it to update, such as selecting another bone, mode switching or transforming the mesh object itself. The issue is resolved after saving and reloading the file. [2020-06-26 12-13-44.mp4](https://archive.blender.org/developer/F8645326/2020-06-26_12-13-44.mp4) **Exact steps for others to reproduce the error** - Delete all vertex groups from the clothing mesh - Shith select on the `armature` then `body mesh` and then `clothing mesh` - Go to Weigth Paint mode - Reset the rotation of the bone - Weights->Transfer Weights - Operator params: - Source layers: By Name - Destination layers: All Layers - Try to rotate a bone. You need to select another bone to update [weight_transfer_bug.blend](https://archive.blender.org/developer/F8645322/weight_transfer_bug.blend)

Added subscriber: @Mets

Added subscriber: @mano-wii

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

Edit:
I mistook it for another problem.
I updated the description to indicate the real steps to reproduce the bug.

Edit: I mistook it for another problem. I updated the description to indicate the real steps to reproduce the bug.

This comment was removed by @mano-wii

*This comment was removed by @mano-wii*

This issue was referenced by a3db0850b4

This issue was referenced by a3db0850b4a9d17aee4b5568270d41a5e5e0b21a

This issue was referenced by 960ce1e394

This issue was referenced by 960ce1e394fac320788f95bfe4e7c8c4e07b7b4d

Changed status from 'Confirmed' to: 'Resolved'

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Weight Transfer Operator target mesh doesn't update when transforming bones #78306