I need to disable the collision of a blueprint in certain conditions, but no matter what I do it still blocks the character. I’ve tried changing the collision presets and checking the BP for any changes in collision. I’ve even tried disabling collision on tick, but it still blocks the character.
Is there some other setting that might affect this?
Hi 
you can show collisions in editor by alt+c and eject 
from player to observe what is going on. So you can first understand if your collision sphere is the problem or something else.
Actors can have multiple components and there can be multiple collisions , skeletal meshes for example can have collisions too however actor with single mesh collision set to none or channels set to ignore should be acting like pass through.
You can show your bp for more info also for many aspects of collision https://youtu.be/o6woG99n248?si=O5n8V3Lf-zestGaX
I would but its pretty complicated and collisions aren’t set anywhere in the BP, so I’m not even sure what part I should show. I will check out that link and try viewing the collision.