Polar H10 keeps dropping connection

Good afternoon all,

Ik have an issue with my Polar H10 which keeps dropping connection while riding in Zwift.

This is my configuration:
Trainer: Saris M2
Zwift: Apple TV 4K
HRM: Polar H10
Companion app running on Iphone 6S (IOS 14.2)
The trainer and HRM connect directly to Zwift.

Are there people who recognize this problem? And yes, can it be solved?