Losing progress

Hey guys

I am curious if anyone else having issues with losing progress continuously?
We have 3 separate accounts, 1 for my husband, 1 for my kids and for me. Usually I help the kids get the cars in every season… and I recognised that we lose cars, points, progress in all seasons one or multiple times.
Like now on the 2nd of dec I finished 3/4 tasks with the Ferrari 488 Pista, but now it is on 0/4 again, the car we own no more, so basically I have to start all over again.
Sadly it is not the first time. We lost cars we got from wheelspins, from rewards like season missions (had to do them again) multiple times…
I am really fed up with this, as I lose TIME, and I get no answer from support.
Anyone having similar issues?