FortiClient gets kicked out of FortiEMS Cloud group

[Magdalena]

Im having following issue:

Im using FortiEMS 7.2.4 with the Cloud functionality and whenever clients go offline for a longer period of time they get kicked out of their workgroup and they don't connect back to their previous workgroup whenever they come back online.

Is there a way to connect the clients back to their previous workgroup even when the requirements don't match anymore or do they always have to match even if they only reconnect?

Is there an option in the Cloud version to never let a client disconnect or increase the time until they disconnect?

Thanks

FortiClient