Priority
A few times now I’ve cast a spell and had the game go straight to attacks without me having passed priority. I had W U up and wanted to cast Luminarch Aspirant but was not able to.
This happened with Seasoned Hallowblade as well. I blocked a Thieves Guild Enforcer, clicked to damage, and was unable to activate the indestructible ability.

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Rodkorpen#46316 commented
same issue still turns up. I declared blockers, and wanted to use my 2 instant removals before damage, but game just skipped to damage without giving me priority (attacker first gets priority, but if they pass I should get priority, it shouldn't skip to damage). This ended up killing me since the attack was lethal without my removal.
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JaxMugen8#86810 commented
This has come up in various different situations where I've been careful to hold full control just in case the game doesn't respond as I intend (such as doing stuff with Midnight Clocks that are about to pop off), but I never expected the priority issue to be here, given that it's so basic.
Basically, opponent is in their second main phase. I'll lose if it goes to their end step and don't do anything (due to Angel of Destiny). I have FOUR DIFFERENT CARDS in hand I can use at instant speed.
Opponent attempts to move to their end step - and I get no priority. I don'tt know if the devs know the rules of MTG, but you can't proceed past a step or phase unless all players pass priority. I SHOULD HAVE HAD PRIORITY HERE. And it's such a basic thing (moving past a main phase while a player has potential instants to play) that I should have to put a freaking stop/control hold in place in order to do it.
Please fix this. NOW. YESTERDAY EVEN. The game is so greedy and has so many issues that something this basic is totally unacceptable.