Pawn not firing any collision events, but still collides with some objects

I am currently working on a blueprint for a character that flies, and am using the pawn base class. All is well except that collision events for the pawn do not fire (I am testing with a print string), but the pawn still knocks over objects that are simulating physics. My blueprint is pretty much the same as in the UFO in the flying template, but it does not seem to be working as far as the collision goes. I have been trying to solve this for 3+ hours, but to no avail.

Have you tried turning it off and on again?

Seriously, I have found collision to have some very strange things happen that tend to fix themselves with a restart quite often.

I have tried disabling it, restarting the editor, re-parenting, and quite a few other things.