BOYD o365 mobile apps logout time

Hi Team,

I got a problem with one of our o365 tenants.

BYOD mobile devices not registered in Intune complain that they have to log back into Team, Outlook mobile and any other ms app every 3 days.
I have feeling that some kind of default MS police triggers here
They don`t have any conditional access policy.
They have App protection policy setup for both platforms Ios and Android
Both none of the settings and time setup reflect this 3 days what user are stating
Please see the scrrenshoot below

Any tips will be approciated