Video stops working after a short while
In video calls, the video basically stops working after a short while (10-60s). It works well first, but then it stops for a few seconds or tens of seconds and either stays stopped or continues with really bad quality. I'm having a call from Android to Linux desktop. The video from the desktop gets completely frozen on Android and the video from Android is just really bad (low resolution and about one frame per second).
This seems weird as everything works well at first. As if something accumulates and when it has accumulated enough, video just stops working.
Any ideas what could be the cause? Can I help diagnosing this somehow?
On Android (LineageOS without Google stuff), I have version 4.2.3 from F-Droid.
On Linux, I'm using current master branch.