Diễn đàn hỗ trợ Thunderbird

I'm a *long-time* TB user and have recently upgraded to 115.0 (BuildID: 20230711125218) on Linux (Kubuntu 22.04.2 LTS). I have multiple accounts configured to use the unified folders inbox. When in that unified inbox, if I delete an email, it stays in the message list instead of disappearing, although the focus changes (the message entry line was highlighted in blue background with white text, and is now in black text on a gray background). The message pane shows the next message as it should. If i click on the message list entry line for the deleted email, nothing happens in the message pane (it still shows the next email), although the focus does come back to the message list entry line. This does not appear to happen when I am in the inboxes of my individual email accounts, but only happens in the unified folder. When I return to the unified folder inbox from the individual account inbox, the deleted message is gone. Thanks for any help.