Shove should break invisibility lol, what a crazy oversight. You can clear entire boss encounters like this now.
Hehe yes, that's why I edited the post immediately after - didn't want to spoil the game further for everyone else.
What's worse is that shove in BG3 automatically succeeds if the enemy is not expecting it. I.e. if you have hidden you have 100% success chance regardless of your strenght, athletics vs the target.