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after upgrading my xperia z5 compact to .224, my SWR30 smartband needs to reconnect very often.
it isn't in my smart lock trusted devices list either in the bluetooth devices list.
poor work! don't promote "improved bluetooth connectivity" if bluetooth is failing this much! 
no! it worked before upgrading, so it CAN'T be the same
This is a user based forum, you can contact Sony directly with your issue >>> this is how >>> Local support
You can also test it in >>> safe mode
i know that, but sony support is watching 😉
and: yeah, problem still there
no, not yet.