Collision issues with character collider

I'm having an issue with the character collider where it registers collisions and I'm not sure how. I put some pictures to show what's going on:

This is the scenario (touching the red rune teleports the character to the beginning so that's to be avoided) You can see there's plenty of space between the rune's and player's colliders if the player touches the the rune they 'reset', but in this scenario they should never touch:

if I disable the resetting on the rune the player can walk through fine:

Settings on the character controller (normally height is at 1.8 but I tried lowering it to see if that would fix anything):

so, what's going on here?! Am I missing something? I can't find anything on google