On a Google Nexus6P w/ Android 8.x the BubbleUPnP app has been rock-stable for me for nearly two years - can’t remember a single crash. Check that you’re on latest Android version compatible with your phone. If it’s a carrier-subsidized unit you may be running into some incompatibility bet. BubbleUPnP and the carrier/manufacturer-hacked version of Android or their bloat-ware.
Like cal3713 said, email the BubbleUPnP developer - he’s responsive and cares.
Like cal3713 said, email the BubbleUPnP developer - he’s responsive and cares.