Whatsapp causing Issues to random users

[UsmanSa]

I have 3 SSIDs configured [ Staff, Student and Guest]. I have applied web filtering on Student and Guest SSIDs as below but Staff users are also facing issues on browsing and sending messaged on Whatsapp. There is no restriction on SSID Staff. Not all users but random users. 

[ConnorL]

With WhatsApp being owned by Facebook, it's likely the "Social Web & Photo sharing" rule that's causing the issue as one of the services in that group is Facebook. Try removing it.