Endless Runner - player catapults itself into air

Hey guys , I m making endless runner game , but my player catapults itself into air sometimes , like he tripped over something on the floor? But ground is completely flat and there is nothing he could collide with, any ideas how i could fix this?

Any chance you’re using adjacent box colliders? It’s a common problem that there are unexpected collisions at the seams.

if so, resolving the issue depends on what you’re actually trying to achieve…

Yes i m using adjacent box colliders , i noticed it happens at seams , but i dont know to fix it . I want my player to keep running straight , any ideas how to fix?