Try disconnecting BT, turn off WiFi and mobile data, and reconnect to the PI on BT. It's helpful to have a utility you can scan and ping with, I have an app called "Net Analyzer" that helps troubleshoot these issue quite well. The app package name is net.techet.netanalyzerlite.an
Written by mr.smashy
Cybersecurity architect. Security dev and researcher. Infosec nerd. Linux enthusiast. All opinions and views are my own. Polite, professional, prepared.