Connection to Stryd and Polar H10 breaking down after 1 minute

Hi all!

Since the update to 3.30, my watch properly connects to my Stryd as a footpod and powermeter as well as the Polar H10 at the start of the workout, but after one minute the watch looses the connection to the powermeter and the heartrate monitor.

I have tried connecting via Bluetooth and Ant+. The problem Shows when the sensors are connected via Bluetooth only or via Bluetooth/Ant+. Today with only Ant+, the sensors didn't connect at all.

I have already reset the Stryd and checked the battery of the H10. They both work fine with my old 935, so the problem definitely is with the 945. 

Any ideas how to solve this issue?