Scaffolding not working properly

Steps to Reproduce:
1. Make your touchscreen computer show the pocket edition controls (Buttons)
2. Get into a stack of scaffolding
3. Attempt to use the spacebar to go up the scaffolding while the Pocket Edition buttons are still showing

Observed Results:
You briefly move up the scaffolding but you don't actually get anywhere

Expected Results:
You should go up the scaffolding like you normally would