Hey @SheriffBuck - thanks for that information - I was going to think that I am the only one having such a strange problem.
Even the USB port looked ok I changed it - with no positive effect - so still everything is working but the payload injection.
I’ve got a couple of old unpatched boards here with knackered D+/D- lines effectively blocking any payload.
Was there a possibility to fix this ? Seems to be a good protection…
Will probably sell the Switch as the normal functions are all working…