Hi and welcome. Might I suggest when you get the bike you have a look at the connector itself and make sure that there is dialectric grease in there and that it is snapped together correctly. You will notice that the pins are very small and need to be firmly connected or..................you know the result.
I know from personal experience as I had the first UK model to have this fault!
I how have a small LED 'gizmo' from "Gammatronix" which indicates to me what is happening at the charging end of the bike, might be worth having a peek!


Hope this helps.

Cheers SteveD

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