someone told me in the forums that the mobs in my SMB1 Remake are getting stuck and will no longer move anymore. is there a way to fix this? if there is, please send me a screenshot. 
@Mariofan2840, I recommend to use raycasts instead of collisions.
Raycast1: set to Angle = 0 and Length = 16
Raycast2: set to Angle = 180 and Length =16
Timer: set to 2 with a Repeat of 1
@Mariofan2840, I 100% agree with JR 01 and that’s probably one of the best and simple ways to fix this problem but I’ve found that repeating delay in the collision behavior works also.