https://www.reddit.com/r/termux/comments/1gks9mf/announcement_termux_broken_on_android_15_for/
https://www.reddit.com/r/oneplus/comments/1go55ow/termux_is_now_officially_dead_for_oneplus_and/
Termux is broken on oneplus devices.
This means winlator, and other similar termux based projects will no longer work.
In addition to that, other Android distributions have also moved “child process limit” to developer options, which may forebode them removing it, and breaking termux entirely. This is pretty scary IMO.
Some software is so complex and difficult that Debian does not maintain it on their own, and instead follows the upstream release cycle.
Browsers are one such example, and as you’ve discovered for me, Thunderbird is probably another.
Also, please do not recommend testing for daily usage. It does not receive critical security updates in a timely manner, including for things that would effect desktop users. Use stable, Sid, or another distro. Testing is for testing Debian ONLY, and by using Debian Testing, you are losing the advantage of immediate security fixes that come from literally any other distro.