I've also been disliking the new climbing system, and I like the old one better, but I will try to share some tips to help you prevent this from occurring more often. When you grab the wall with your character's back or shoulder on the wall, it will cause them to climb like that. Climbing is also affected differently when drop-kicking or falling for a long distance and then grabbing, so always pause before continuing. Don't try to climb on the corners or bumps since it is more difficult for the character with its small leap. Make sure your character grabs the wall before holding the jump button. Holding or pressing the jump button in lava with an unsuccessful grab will cause your character to dive into the lava. Diving into lava can cause you to get under bumps or your head getting in the way of climbing properly.