Playing arena 1/1 and I was playing against shaman that had imbued his hero power.
On my turn I tried to kill one of his minions with Siphon Soul but wasn’t able to target it, then I tried attacking with my minions but I wasn’t able to target anything because a minion with taunt is in the way, tried to target my own with Soul Siphon and then quitted the match
when this happens, and the game behaves like something is missing on the board (ie a minion with taunt that prevents you from attacking even though there’s no taunt minion visible), always restart the game asap, it usually fixes it