Yep, same issue even though I had the dongle 1cm from the case, but these dropouts are giving me some good training.No need to do it again, but @AndyMacca doesn't seem to be having as much luck!
I'll have the 3rd attempt tomorrow. I tried the dark side to see if signal also dropped out on that but as they offer only limited free km's during the trial it wasn't a long ride and the signal held on for all of it so that was a bit inconclusive. 
Interestingly my watch maintained an ant+ connection with the bike for all of the rides I did today. I think just to get it done I'll go back to my old laptop - shame it doesn't fit on my tablet stand though.
Think positive think positive....

Handlebars a bit cramped with a 17inch laptop on there but a small price to pay to go through all that pain again. No dropouts so I'll run with it like that for a bit. Beer and crisps on order.
🍻
55 mins exactly
Every day is a school day