Originally Posted by
beckoa
Several agents have mentioned that when performing a SDC, *DO NOT* checkin for your flight immediately afterwards. This is a recipe for some reason to not get waitlisted. In fact, one should wait 15+ minutes. I'd give it at least a half hour, and then try checking in. And make sure your name appears on the app; I've lost out on upgrades this year due to this bug.
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Thanks for mentioning this. I'll try waiting 15 minutes before checking in for the new flight the next time I do a SDC.