Windows 10: Why are my bluetooth headphones playing sound from only one application at a time?

Why are my Bluetooth headphones playing sound from only one application at a time? For example, i have connected the wireless headphone through Bluetooth and now I'm playing a video game but when i join a call with my friends, no sound is heard from the video game's audio. Even if i join the call first, no sound from any other application is heard. Please help me.

:)

 

bluetooth headphones

setting up win10 Bluetooth and my Bluetooth headphones work fine ,but every time I reconnect the headphones I have to delete them from Bluetooth settings and let win10 pickup the headphones again ,before they will pair ,then win10 want to reboot to add the headphones ,I reboot and they work fine ,but next time I plug the headphone in again they will not pair ,don't even get an option to pair till I delete the head phones from the list ,, any suggestions ,, thank

 

Windows: Wireless/bluetooth headphones disconnect and then reconnect without sound if pc stops playing sound

Windows version: 10 pro, version 10.0.17134 Build 17134 (according to system information)

headphone brand: 3sixT wireless bluetooth headphones
laptop: surface laptop

Issue:

Headphones connect to laptop, listed in bluetooth settings as connected for voice,music

If I don't start playing any sounds (music, youtube etc) in the next ~30 seconds after connecting, the headphones alert me that they have disconnected and reconnected, but now they list only voice connected. Same thing happens if I was listening to something and stop/pause it for too long.

They are no longer available in the audio output changer in task bar when this happens and any audio played goes through laptop main speakers.

The device manufacturer (3sixT) does not provide any drivers and they seem to use the standard bluetooth headphone drivers available on whatever system they are connected to.

These headphones connect without issues to my phone (android); issue only seems to be with my laptop.

Unable to find many discussions of similar issues, and those that I could used outdated advice / settings that no longer exist (one suggested something in power settings for the device under the device manager page, but that setting/tab doesn't appear for my device)

tried uninstalling/reinstalling drivers, rolling back drivers, making sure bluetooth service start automatically... Nothing seems to work

Any ideas how I can resolve this, so that my headphones can sit quetly for any amount of time without disconnecting / reconnecting without dropping the 'connected music' setting?

 

Bluetooth headphone sound volume keeps changing.

I have a relatively new Bluetooth Pulse Echo headphone set and an Acer Aspire 3 notebook that has Windows 10 O/S. When I use the headphones with the notebook in wireless mode the sound volume alternates between normal and very low. I have run Windows Bluetooth fault finder and disabled sound enhancements to no effect. The headphones work fine in conjunction with my iPad however.
Could anyone suggest a solution for this problem please?