Hi jmprats,
I still have the same problem i contacted Cisco TAC but the issue continue. Just to know, what is your currently enviroment (APs+WLC)?
Thanks!
Right now, we have the same issue with whatsapp since we added a WLC in the network (2 weeks ago).
WLC: AIR-CT2504
APs: AIR-CAP3702E-A-K9
The were no problem when we used the same APs but in autonomus mode (without the WLC).