Pain for All bugged

Steps to reproduce: After "Pain for All" enters the battlefield attached to a creature and the ETB trigger goes on the stack, remove the creature from the battlefield in any way (exile, destroy, bounce).

Platform: Steam, MTG Arena

Actual result experienced: If the creature is removed after the trigger goes on the stack, the trigger will deal no damage.

Expected result: The trigger should still deal damage based on last known information of the creature's power.

Additional context: Tested in "Pioneer Storm Herald combo", where the old combo was Storm Herald + Colossification + Burning Anger. With the printing of Pain for All, was testing it as an upgrade over Burning Anger. However despite the wording on the two cards being identical, Pain for All's damage can be stopped by removing the attached creature unlike Burning Anger. Asked in the MTG Judge IRC to double check I wasn't missing something, and the agreement was that the damage should still go through. Attached log has the issue happen in the last two matches played.