State enter condition don't receive event

Hello,

I have an issue with transitioning between states with event condition. I have this transition and it works fine.

But if I add “Required Event to Enter” it stops working.

Event is not consumed on transition, and it is 100% same event, so I really don’t know what can be wrong here.
My state tree:

So, I accidentally solved this, but I have no idea why it works. Adding empty sibling state is solving an issue. So everything is the same except my state tree look like this. Weird fix, but ok.