Ive noticed that when you shoot the m2 or m29 mortars manual without the artycomputer, the range where the grenades drop varies from mission to mission. As you can see in the video, after each mission restart, the rounds drop, sometimes closer and sometimes further away, but never directly on the target despite the same elevation.
SOG mortar elevation bug
Bug only tested with the m2/m29 not with the PAVN/VC mortars or any howitzers.
Place mortar + target
fire the mortar at the target
restart mission
repeat with the same elevation
range diffrence should be clearly visible after a few restarts
A similar bug also appears when used with ACE3 + Compat. As you can see in the video, certain elevations seem to let the grenades fall short. In the example in the video, its the elevation 1392, but as also shown, after a mission restart, the elevation 1392 works again as it should.
SOG ACE mortar elevation bug