Agreed, this is obnoxious. I was already irritated when it went from T-30 to T-45. I don’t always check a bag, but when I do, I’m normally at the kiosk at T-46. Or sometimes T-44. (Including, at BWI, on a flight where UA really did have my back by allowing me to switch from an IAD-SFO to BWI-SFO flight (connecting to Asia), and then letting me check my bag at about T-40. Traffic was brutal that day.

Thanks for the heads-up, OP, or I would definitely have missed this.