Changing skeletal mesh when montage is running crashes game

Sounds obvious, but I didn’t see this mentioned anywhere in the documentation.

Basically, my character’s armor can break. When it does, the game may swap the model, depending on the armor. If that happens during a combo, it crashes the game. It only happens if the skeletal mesh being swapped out is the one the animation is being copied from(with Copy Pose From Mesh).

There are dozens of attack montages running in succession, each with dozens of animation notifies firing. Since it only crashes if it happens during a combo, I can only assume it’s because of the montages and/or notifies.

Sure, I can just cause the combo to drop if the armor breaks or whatever, not really a huge problem, but is my assumption correct?

Is it unsafe to change the skeletal mesh when montages are running or notifies are firing?