After I start recording from an M3U source, wait a bit, and then go to Recordings and play the video, it plays fine for about 20 minutes and then Emby Server and my computer become largely unresponsive. My computer, in particular, loses all network connections; many applications will not run or exhibit strange behavior; it won't even shut down properly, so I have to turn off the power.
Note that this procedure produces the same problem every time, regardless of how long I let the video record before playing and whether throttling is enabled or not.
Playing videos for which recording has completed works fine.
Logs are attached.
Also, I noticed that my system log reports the following error around the time the crash occurs:
kernel void IOAccelFenceMachine::fence_timeout(IOTimerEventSource *): IntelAccelerator prodding blockFenceInterrupt
I thought this issue might be macOS specific (I'm on Catalina 10.15.2), so I installed the Emby Server Docker container, but I get the same behavior - my computer doesn't freeze, but the container becomes unresponsive, forcing me to restart it.