4. Too high or, conversely, zero activity
If your primary device has been turned off and hasn't appeared online for more than 14 days, WhatsApp updates encryption keys, which may result in session termination.
If there's no activity on WhatsApp for 30 days, WhatsApp may terminate the authorization.
Conversely, if WhatsApp detects that you're sending too many messages, it may "extinguish" Chategy session, suspecting spam activity.