Something you may want to test out Dimonic is whether this happens when you run Discord inside a browser as well. I've had similar issues that didn't occur when Discord was running inside Firefox or Chrome but did show up with the Discord app itself running.
Eventually I found this particular suggestion fixed the problem for me (even on a non-arch distribution as well, PulseAudio is PulseAudio): https://wiki.archlinux.org/title/Pul...s_or_crackling