There was a bug at one point that caused the sim to consistently (I think) not remember the weather setting selected by the user on a quit/launch cycle of the sim.
Anyhow, that bug was resolved some time ago, however I have consistently had an issue where the sim will occasionally load with custom weather, even though I never use custom weather and always have it set to live.
I sometimes think it is tied to an aircraft change, such that when I quit and reload the sim after the change, the weather will be on custom. I cannot say for sure, though.
Anyhow, I’m not finding an open bug that indicates anyone else having reported this issue. Does anyone else experience this occasional uninitiated live-to-custom weather switch?