I highly appreciate your cooperation and am sorry to admit that the current issue is on our end. Although, it seems to be related to the UI thread only, it certainly requires our attention.
To be able to proceed, I will submit a bug report which progress you can then follow. However, I was wondering if this thread can be converted to a public item? Do you mind if I submit the current ticket as a bug report? Does the shared screenshot expose any confidential information?
In case you confirm this can be used as a public item, I will proceed converting it. Otherwise a new item will be submitted on your behalf.