Yes, I got one as well. I'm flying CHO-IAD (UA6874) on my way to EGE, all UA award travel. Checking it now, .bomb lists UA6874 as operated by United Express/Colgan Air.

Adding to the unusual behavior, I was bumped out of my previously secured exit rows seats, and although .bomb lets me select them again, the seat change doesn't stick. When I try to check in online at united.com, the seat change blocks all exit rows seats on all three segments (but I don't want to change to these on 2nd and 3rd segment, just noticed it).