I have the same issue....with walletofsatoshi users...I always have to go profile to zap. Can't use fork also.
Instead of an error zaps should just go to the user's npub.cash address. Could also be a user setting on my side. What do you think nostr:npub1gcxzte5zlkncx26j68ez60fzkvtkm9e0vrwdcvsjakxf9mu9qewqlfnj5z? 
I have the same issue....with walletofsatoshi users...I always have to go profile to zap. Can't use fork also.
No replies yet.