Because you most probably had landings that expired (due to them being occurring more than 90 days ago) at therefore are no longer counted on the 90 days row.
This IS the problem. Landings, flight times and XP aren’t consistently counted on the Beta platform. I hope it doesn’t carry over when the update is released.
Not my experience as of yesterday. I did 5 T&Gs at ONT. Landings, flight time and XP didn’t move. I won’t be using Beta going forward. Hope to see you in the skies!
This is in Beta?
Why did you not say that initially or report it in Open Beta? - that makes a rather big difference here in retrospect.
But as others have mentioned, it’s been fixed (at least we thought it was). And if it’s continuing to be an issue for you, please do make sure to report in Open Beta