After last update on windows problem with Polar H7 HRM / on IOS problem with ERG mode

Hi all,
I have problem since the update (27.02) on my laptop (windows), with Polar H7. Pairs, but never picks up HR and displays No Signal soon after. So I checked HRM with Zwift and Iphone as partial solution and HRM works. I was works with iphone since 27.02 till last Saturday when Zwift update on iphone. Since that time on phone do not work ERG mode and on windows still do not work HRM.
Anybody else suffering from the same problem ?

Cheers