Grouped layers Z-index bug?

When I put the yellow and red circles into different groups and change their Z-index values, the rendering order doesn’t update.

I’ve tested several versions, and it seems like v1.3 (from June 11, 2025) is the only one that works correctly. The newer versions (including the latest update) don’t seem to apply the Z-index change properly between groups.

I’ve attached a screenshot for you to check. Hope this helps