Bluetooth dropping out from Garmin Pedals

I have just tried Zwift for the first time, normally training on another platform. I am using an old spin bike, with Garmin vector 3 power pedals. My first impression of Zwift doesn’t seem great, as my power meter keeps dropping out. They are connected to my new laptop via Bluetooth. Is there any reason for this? I have been using my power pedals on the other platform for months and never had a problem.