You may want to attempt a firmware update on your Ortur as PY has suggested.
There have been several changes to the firmware in the engraver itself -specifically with respect to the flame sensor- it’s outside of LightBurn but LightBurn talks to the controller. Downloading a fresh copy of 1.0.06 from LightBurn won’t change the firmware.
Few important aspects in the Change logs which i recomend everyone to read
a) The flame sensor will now be by default disabled. Although the sensor works as intended, the variables on UV light exposure on each user envorioment been causing users more agro than benefits.