Do other apps do that too? I suspect that the "unstable" build of the OS might be the problem, not OBS. It's meant to try things, break stuff, report what broke, etc. Use the "stable" builds for anything useful.
Arch and rolling distros work differently. That doesn't mean you can't have a recent version of OBS Studio under Debian Stable. Right now in the Debian Stable (12/Bookworm) repository is version 29.0.2, which works well. If you need a more recent version of that, you can add the Deb Multimedia repository which has version 29.1.2. So that is quite up-to-date. Plus there are other recent OBS packages (snap?) that you can use with Debian Stable.
By using Debian "unstable", yes, you're getting a rolling release, but not one that is meant for general usage, unlike Arch and others. Use Debian unstable if you are a Debian developer, or similar. Otherwise use Debian stable or perhaps testing, if you want to be a bit more recent package base.
You could move the OBS config and see if it goes away:
The Linux version of OBS is still under development and contains many bugs, but if you're feeling brave, and can install Ubuntu PPAs, then you can give this a try. If you're on Ubuntu 14.04 LTS, you'll first need to install FFmpeg: sudo apt-add-repository ppa:kirillshkrogalev/ffmpeg-next sudo...
So you use a "stable" release for, well, stability, and then you get OBS from there.