Prestashop version 1.6.1.12
I have the same problem. I disabled some countries which we couldn't ship to during the Covid-19 lockdown.
I have now activated some of them again but when a customer tries to register there are no countries appearing on dropdown during customer address registration. It is also not allowing entry of a country for any shipping address during the order process.
Did you find a solution to this problem?
Many thanks for any help !