Had 2x this year when I was confirmed in D1and due to the downgrade to smaller cabin got bumped both times to Y
one was using a cert (so I understand) but another was laid D1. I guess I was just lower priority…I ended up flying AA and getting my upgrade to Biz confirmed right after same day purchase
I also just noticed my flight Aug 14th has already been downgraded to 757
prob cancel and fly AA