Versioning Up To 4.26 Caused A Bug In My Game?

I’ve been working on a parkour game in Unreal version 4.25, and when I updated my unreal to 4.26 it’s caused a bug with my character wall climb blueprint where he won’t stick to the fall and just falls off if it’s attempted. I’m not sure what could be causing this and I only have the one project version, does anyone know what in the update could have caused this?