[2020] Did they just regress on Legion Warboss??

Long time ago, Arena was dumb enough to let Legion Warboss make a token before giving you a chance to kill it with an instant.

Then they fixed it so that you would have priority before going to combat, so you could kill it before combat began and it could trigger to make the 1/1.

But just now it did the old way again! I had Bonecrusher Giant open and it just skipped straight to it generating a token before I was given a chance to activate Stomp. Nothing was on the field except weenies like Warboss, Scorchspitter, that sort of thing. There was no reason for Arena to not let me respond before entering the combat phase. It let me cast Stomp, but only after Warboss had already activated, so they got the 1/1.

Did they just regress with the latest updates?