Folks this has seemingly been happening a lot over the past year or so, maybe once a month-ish?

AA's system inadvertently dumps a bunch of C space overnight and then pulls it back within a short amount of time. But everyone's EF alerts go off and the space is usually gone by the time you can check when you wake up.

The last time AA actually cleared some upgrades then tried to take them back.

SWU / upgrade cleared then reversed (merged threads)