When multiple views are running in parallel, updating one breaks the other

[bourdaisj]

Description

With 2 LocalView in parallel in the same application, if you call view_update on the first one, the other will become black. If you interact with the black view, the view will recover but with the wrong size/aspect ratio.

Where does the issue originate?

Upstream Project (VTK itself)

Version Information

"trame-vtklocal==1.0.1", "vtk==9.6.20260405.dev0"

Steps to Reproduce

Run this code snippet with uv run - click "add view" once, then click "update" once, and you should reproduce

repro.py

Relevant Log Output

[bourdaisj]

I'm also reproducing this in the VTK release branch (commit c10b3b9208c3ced74da300d112196eb1d1fad336)
any ideas ? @jourdain @jspanchu

[jspanchu]

apologies for the late response, i can reproduce this. looking into it now.

[jourdain]

trame-vtklocal>=1.0.2 fix it

[jourdain]

see https://github.com/Kitware/trame-vtklocal/blob/master/examples/issues/76.py