I was experimenting with the crumbling block (Bank 15 Obj 38) and noticed something weird when I placed a Delete trigger on top of it (not on the same position, but one tile above). If the trigger is activated, the object right above the crumbling block is removed and the block remains on screen, as expected. However, once this happens, the block below the Delete object starts behaving like a regular gray block and won't fall apart when the player steps on it. This happens even if the Overlay feature is not enabled.
Does anyone know of a workaround for this? I tried making an OCO with an X offset of 24, so I can place the object on a different position, but this doesn't displace the collision mask.