After update Venu 3 chops the walk

Hi all. I updated the venu 3 firmware two days ago to 9.24B (so guess it is a beta) since then every morning my walk which  about 8km to work get chopped up to 3 walks. about 2.5 each.  So it autostarts the walk it stops it and starts it again. A few months I have has this watch this has not been a problem. Is there a way to downgrade the FM? Anyone else having this problem?