Bluetooth stopped working Deathstalker v2 Pro TKL

My  Deathstalker v2 Pro TKL stopped connecting over bluetooth. LEDs blink slowly (1 blink/s) and holding the buttons to enter pairing mode does not seem to work at all. Wired and 2.4G work fine.

Someone else seems to have the same issues but no resolution has been posted:

https://insider.razer.com/razer-support-45/deathstalker-v2-pro-tkl-bluetooth-has-gone-cracy-71589?postid=240903#post240903

Please help.