I have a Sony Xperia Z5 Compact and in the last few months when I have bluetooth active on the phone and I send an SMS message (using the default messenger app), the message sends to the recipient but still shows as pending (swirly circle). To clear this, I have to turn off bluetooth and restart the phone, at which point it sends the message again. When bluetooth is not active, SMS behaves normally.
I have had a recent update to Android 7.1.1 and this did seem to fix the issue but it has now returned. Has anyone experienced this ? (and hopefully resolved it !). TIA