@cichaczech thanks for confirmation! The fix will be included in 3.5.0-rc.1. I'll mark the Github issue I created at https://github.com/Duet3D/RepRapFirmware/issues/869 solved.
dc42 created this issue in Duet3D/RepRapFirmware closed [3.5beta3, beta4] Unexpected reset when using laser mode #869