FIX !!!!!!!!!!!!!!
Actually i think it's software problem, my Bluetooth speaker was playing normally when i've installed new windows before updates get installed.
I have try all methods have been wrote here, and unfortunately non of them worked for me.
So for now i just make Add device for Bluetooth (just searching, you must not actually add device) each time you connect to your speaker, if it does not work from first search close it and make search again.
Control Panel\Hardware and Sound\Devices and Printers -> Add a device.
i hope microsoft fix this issue as fast as they can!