Bluetooth and Ant+ not working

i have an relatively consistent problem (but doesn’t happen every time), were i can either not get my smart trainer connect to zwift, or it connects but can’t be controlled. It can also happen mid ride.

this happens with both bluetooth and Ant+, and i’m at a loss to know whether it’s the smart trainer or the laptop i am connecting to (the laptop more than matches the specs needed for zwift).

so does anyone know i way of testing the smart trainer and the laptop separately so that i can narrow down the problem? i don’t want to have to replace one or the other without knowing which is causing the problem