Runn turns off after some seconds

I use Runn with Bluetooth to connect to my PC and run at Zwift. Until Tuesday 11th April it worked without problems. Yesterday (14th) there was a Major-Quality-Windows-Update KB5001330 

And since the Runn turns off (LED get off) automaticlly after some seconds if i connect via the Zwift-Software.

If i use Zwift on my Smartphone or Configurez the connection is stable.

 I think this is a Win-Problem, but what can i do?