@clacke Looks like pretty normal unicode problem. Instances use different character encodings and I guess ActivityPub doesn't specify encoding.
@clacke Also, I just realized that probably can't be the problem. More likely the other instance uses version of Unicode that doesn't have those flags.
@clacke OK, It's more complicated than that: https://en.wikipedia.org/wiki/Regional_indicator_symbol
@clacke I'm just too lazy to setup two Frendica instances, one with UTF-8 locale and the other with UTF-16 locale.