Wowza concurrent sessions increase drastically

HI, We are running wowza for major Telco company we have very good physical servers we have an issue:

When concurrent sessions are like up to 14000 everything works fine but then suddenly something happens in 8 minutes sessions increase from 14000 to 65514 and then wowza stucks and all streams stops.

We are facing this problem quite often as there are some main events that we are streaming.

Is this a fake user? how can we determine that?

I think its some kind of attack or fake sessions or may be some configuration mistakes at our end because when time to reach 14000 sessions is 3 hours and in just 8 minutes sessions increased to 65514…

Please guide us what we can do already submitted support ticket to wowza… If anyone faced this issue please suggest solution

Thanks

See in one minute from 44ooo to 61ooo

Need solution ASAP