I didn't tag this as a bug or send a ticket as I think this is a deliberate feature.
After somewhere between 2.0.5 and 2.0.7, the respawn selection sometimes reset itself (i.e. you chose to respawn at an airfield, but it resets itself to the default respawn point)
This usually happens when a capture happened (not necessarily related to respawn points), but it could also happen just at a random timing.
And this is very, very annoying.
I have been forced to fly from the far side of the map 3 times just this morning, with some of them resetting the spawn point selection right before I clicked "battle", and I didn't even have a chance to select it back.
Please, WG, remove this function.