Ok, thanks for clarifying. Seems like I forgot to correct for the location of the grid in the experimental unit’s SimulateMove function. Here is a version of the function where I’ve corrected for the grid’s transform.
Less certain about your other issues, though, as I’m not able to replicate them. Do they still appear if you use BP_Unit_Anim_Ex instead of your own custom unit? Also, what is the precise height of the box the unit is climbing and where have you placed the ladder blueprint’s 3D widget?