@nebulon Fully agree, it's really odd that Wix doesn't allow AAAA records in this day and age.
I'll change that domain to noop for now then as recommended, but my preference is to have the logic of the location DNS propagation check change so that domains in manual status can still be successful even if only one IPv4 or one IPv6 address is set rather than both. The noop is for development after all, isn't it?
As long as one of the DNS records exists, that should be seen as successful IMO, since it will work in terms of getting traffic to the site still. There shouldn't be a reason to fail that.