Inconsistency with timing prompts
There "seems" to be an inconsistency with the timing prompts.
I am often holding a green card that makes a target permanent hexproof.
Sometimes, when my opponent is targeting my permanent, I am given a prompt / an arrow that shows they are trying to target which permanent and I am given an opportunity to cast the instant that protects one target permanent. But, I was just playing an opponent who cast Ugin. I was prompted to allow entering it to the battlefield to resolve but no arrow saying he was targeting a permanent. Then, when I let it resolve, my permanent was destroyed (costing me the win). I don't know if this is a general inconsistency or if this is about ugin in particular... But, it is frustrating.