Snoop snitch crashes
On a OnePlus 3 with Android 7.0 (OxygenOS 4.0.2) SnoopSnitch launches, asks for root permission, gets them granted and the a weird loop dance starts. Every second or so a popup appears saying SnoopSnitch got root access granted. Some short lived messages show that some command line got executed which then probably fails. The problem is not only that the app crashes and doesn't work. It's even worse because it turns your phone into a totally unusable state as you constantly get popups. The only way out is to delete the app and reboot.
In previous OxygenOS 3.5, it complained it couldn't get access to the baseband diagnostics port. That problem went away after installing the OxygenOS 4 which seems brand new.
I filed a feedback report on that device. The version of SnoopSnitch is the one from the Google AppStore downloaded today.