Pay-with-Points flights. BUSINESS Centurion 50% refund, Platinum 35% (2024-25)
Booked a UA flight on 11/18 with points/cash using my personal Gold for the cash portion. Had a Business Gold at the time(have since upgraded that to a Business Plat). Still haven't received a points rebate. Not sure if I will. Not a big deal either way only ~10k points but this is the first time it hasn't happened like clockwork after 31 days.