Hitting a barrier while flying

Hello, last night I had a pretty cool LD where I was flying around my yard. I kept flying upward and about fifteen to twenty feet off the ground I hit a ceiling. I’m not sure why this happened, but I was wondering if it has ever happened to anyone else.

i glided down a canyon whn a 2 story building appeared wich i promptly smacked into

Ive never had that happen, but sometimes I will have problems going through walls, for some reason I go through it, only to have to keep going through the same wall. This espesilly happens when I AP.

Yeah, I used have a problem like this. Now when I fly to that height, I will a force to pull me up or I reverse gravity until I pass the barrier.