Odd. I've tried adding watch first, and it just... waits a while before saying it can't add the card, saying I need to contact the issuer.No problems here. I loaded my PC Fusion cheque and credit cards through the Wallet app and it asked if I wanted to put the cards on the phone or the watch, I selected phone but after it does that it asks if you also want on the watch, so I followed those steps too. Then I added a virtual card using the FNB app and it was the same there too. Phone first then watch.
Yet it works perfectly adding onto my phone.
I AM running a Series 0 watch, though, and I don't feel like spending money to upgrade it.