I have had a V.E Direct Bluetooth Smart Dongle connected to Victron MPPT 100/30 solar charger for many years without a problem through OnePlus 3 phone. Now all of a sudden, Bluetooth disconnects/reconnects in every 30 seconds on my phone using Victron app. Very annoying. Done pairing again with, restarted phone, disconnect and reconnected Bluetooth wire from the solar charger etc., but in vain. What to do?