Starting at 10:09 a.m. PST, some optimizations would be stuck in an “in progress” state due to an internal infrastructure error.
At 11:15 a.m. PST, all affected customers could optimize successfully again.
For the optimizations being executed at 10:09-11:15 (and affected by this issue), they are now in a failed state.
Further investigations are being conducted by the engineering team.