Bluetooth headphone streams dropping but not disconnecting while using Netfiix

I have the most bizarre issue.

I have only noticed this while watching something on Netflix, basically I'm watching a video, doesn't matter which through my bluetooth headphones and after about 4 minutes or so the audio stops streaming through the headphones and begins to play through the phone's internal speakers.
I check the status of bluetooth at the time and it says my headphones are still connected, also I would normally hear a message while wearing them to say the phone has been disconnected if that was the case. Now nothing plays through the bluetooth headset not even the system music app and the only way I can get it working again is to switch bluetooth off and on again.
I have tried uninstalling and re installing Netflix
I have tried re-pairing the headphones, I still get the same issues.
If I don't use Netflix at all and just the music app I get no dropouts.
I have only noticed this since the last update to marshmellow and not pointing fingers in that direction but it's just around that time it started playing up.

Phone is an xperia z5 unrooted E6653
Android 6.0
Kernal Version 3.10.84-perf-g19d6d92 buiduser@buildhost #1
Build number 32.1.A.1.185

I'm trying to avoid a factory reset if possible, do any of you guys here have alternative suggestions?


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