My phone is randomly vibrating and I cannot seem to pinpoint what app it is coming from. I could be holding my phone using it or I could have it sitting with the screen off and it will occur. The screen does not light up nor is there any indication that I have a notification. All my notification settings seem to be okay (any apps I have turned sounds on for should also have a badge app icon and show an alert). Is there some sort of log I can look at or tweak I can install to determine what may be causing the vibration? I really do not want to have to uninstall tweaks and apps one by one to find the issue.