Yeah, I'm not sure about that because I have a semi-physics trigger that's setting my height every 0.0 game seconds, so that's definitely not the issue. I've used the TriggerDebugOutput function to verify that my unit's height is correctly set. The flag is being ignored, and my unit is hovering 8.0 above the ground, which is already 8.0 totaling an absolute height of 16.0. As soon as I move, it's corrected and my unit is standing on the ground again. As soon as I change the height again, it breaks. When I move, it fixes.
To reiterate, I've tested my unit's height all points in the scenario I just described and it's always constantly at 8.0. The only thing that changes is whether or not it's relative to the terrain, which means the flag is being ignored in a certain case. That case seems to be any time I change my unit's height.