I noticed more and more times that some mobile apps are able to block requests, and they don't forward those requests to the server if they're going to be intercepted with a proxy like BurpSuite. This not happens for all installed apps on my device but only on fewer ones. At the beginning, I thought that it could've been a problem due to TLS or SSL certificates, but them seem to be properly installed. In fact, I'm able to intercept the request for
google.com when using safari for example. Note that with this kind of apps what happens is that when I start one of them, every request gets "stucked" and BurpSuite shows nothing in the interceptor proxy, then it simply time-outs. So I would like to ask, how is it possible ? How gets prevented a sniffing attempt through a proxy, and can this security restrict be someway bypassed?
Currently testing on iOS, but I don't exclude the same goes for Android.
Event Log shows this:
 The client failed to negotiate a TLS connection to site:443: Remote host terminated the handshake