Double Collision on perfectly positioned GameObject

Hey Folks!

Im currently working on level design for a fast-paced runner.

Of course its important for all collisions to be predictable instead of random, which is why I perfectly created all obstacles as prefabs which means they should all have the same behaviour.

Now im having problems with ramps, as they sometimes completely stop the player instead of the normal collision about one in every 5 tries:

double collision

When this happens, a double collision is logged:

This is the ramp:

Which is positioned perfectly without any overlaps:
image

What can I do to fix this?
Are there any Physics settings I can mess with?