The animations and collapsed state of the notification shade are corrupted

When attempting to diagnose another problem with my brother’s device:

…I noticed his cmd statusbar expand-notifications:

https://youtube.com/shorts/CeKvBt0xVEM?feature=share

Has anyone else experienced this? If so, do they know whether this fault is downstream or upstream, whether it has been reported, and if so, what the report identifier is (whether ZenDesk ticket or Google Buganzier URI)?