Today I was number 1 on the standby list on the app. About 20 minutes before boarding the former number 3 on the list was cleared. (I have screenshots showing this, so it's not my imagination.) 30 minutes later I was cleared at the normal time with several other standby customers.
What could have caused this? Federal Air Marshal? Jumpseater?
Do you have status? If AList/AListP lists standby they will bump non tier passenger.