once could have prevented that from happening configuring the following:
Using tmsh to modify the database key
1.Log in to tmsh by typing the following command:
tmsh
2.To set the database key to either true or false, use the following command syntax:
modify /sys db failover.vlanfailsafe.resettimeronanyframe value
For example, to set the database key to true, type the following command:
modify /sys db failover.vlanfailsafe.resettimeronanyframe value true
3.Save the change by typing one of the following commands:
save sys config
https://support.f5.com/csp/article/K13297