Honestly this is awesome, unfortunately I neither have the skills nor the confidence nor any of the tools to desolder and re-solder the parts 
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My update.
As per my request Bambu support are going to replace my AMS 2 pro under warranty…just working through that process now.
I did ask the question if they have narrowed down the problem to a production batch of AMS’s or identified the actual cause. But alas no answer to my questions…
Strange thing is that after I pulled apart the AMS 2 all the way to Hub apart as well and put back together with no replacement parts it has been working perfectly but I’ve only done a handful of prints.
My concern going forward is even with another brand new unit the issue will return…seeing they don’t seem to know or want to admit what the problem is.
Cheers
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They sent me a new AMS 2 Hub which I installed today, and after numerous prints with numerous loads/unloads, it’s currently running fine. Hopefully it stays this way.
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Esa es la clave, he acercado los sensores y ya funciona mi AMS2. Gracias por la solución, espero que el Soporte de Bambulab encuentre la solución y mande esa plaquita que no debe costar mucho y se cambia fácil.
Got my replacement hub fitted and so far things have been fine running on my H2D. I think this proves that the issue is definitly down to the hall sensor for the hub motor, when replacing the hub the motor is used from the previous hub and is working fine so it must be the sensor that is at fault.
I image that Bambu are fully aware of the issue and we will see a redesign / replacement sensor being used in the near future. I just hope my new hub continues to function without issue, the first one only lasted for just over 400 hours of printing.
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Dang, mine only lasted for ~50 hours of printing…