Fiddler session disappears after being shown

Question

I am tracking an IOS app through fiddler as a proxy. And for some requests from the IOS app, fiddler will display those sessions in a flash and then those sessions are gone. It is against my common sense that why a landed session in fiddler will ever disappear. The only thing I can think of is that the response of the http session is violating the protocol? But the IOS app behaves normally with those http requests and responses.

I did catch some screen shots for the http request while it is being displayed in fiddler, and here is how it looks like for each fiddler column:

#:76
Result:-
Protocol:HTTP
Host:184.102.xxx.xx
URL:/someUrl/someHashCode
Body:-1
Caching:

Does anyone know what is going on here?

Answer 1

In both cases, the traffic is being hidden by a filter. Click Help > Troubleshoot Filters and follow the instructions.