Added AMD_DEBUG="nongg,nodma" to /etc/environment but it happened while opening
a webm file in a new tab in Palemoon.
Nov  1 20:10:30 pop-os kernel: [24044.197839]
[drm:amdgpu_dm_commit_planes.constprop.0 [amdgpu]] *ERROR* Waiting for fences
timed out!
Nov  1 20:10:30 pop-os kernel: [24049.317800] [drm:amdgpu_job_timedout
[amdgpu]] *ERROR* ring sdma0 timeout, signaled seq=3673639, emitted seq=3673641
Nov  1 20:10:30 pop-os kernel: [24049.317836] [drm:amdgpu_job_timedout
[amdgpu]] *ERROR* Process information: process Xorg pid 2350 thread Xorg:cs0
pid 2351
Nov  1 20:10:30 pop-os kernel: [24049.317838] [drm] GPU recovery disabled.

I'd think it happens less though.