Thunderbird ஆதரவு மன்றம்

I just upgraded to 115 and now Thunderbird is not usable any more. I have a HiDPI 4K screen, KDE Plasma and Wayland. Everything in Thunderbird is HUGE! It cannot be used. All other apps, including Firefox scales right, without issues. What can I do?

Operating System: EndeavourOS KDE Plasma Version: 5.27.6 KDE Frameworks Version: 5.108.0 Qt Version: 5.15.10 Kernel Version: 6.4.3-arch1-2 (64-bit) Graphics Platform: Wayland Processors: 8 × Intel® Core™ i7-10510U CPU @ 1.80GHz Memory: 15,3 GiB of RAM Graphics Processor: Mesa Intel® UHD Graphics Manufacturer: Dell Inc. Product Name: XPS 13 7390

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.

Whenever I click on my main combined inbox, it seems to "search" my email account. The task takes up a lot of the CPU and the program will become unresponsive and sometimes it even crashes my GUI.