Zwift quits and doesn’t save after I freewheel

Hi all. My 1st issue here and very frustrated.
Three times now zwift has reset and taken me back to the start during my ride WITHOUT saving my progress.
This happens after a long climb like alp du zwift. I finish the climb and quite often give a max effort to see how fast I can go down hill but after a few seconds of freewheeling zwift simply stops and takes me back to the start resetting all history and stats and doesn’t save my ride.
Has anyone else had this ?