Problems with following peertube channel

Hello. I'd like to follow #apconf2020 #PeerTube channel @ActivityPub Conference . I've followed it, but I cannot see it on my contacts list. Also adding it or removing from any group does not work. On contact page I can see "Unfollow" button and a tick next to "Friends" group:
cc: @Mikolaj @Friendica Support

@eest9 He is not using Mastodon. 😀
@loziniak I just tried to add the channel as contact. It was successful. I also moved it to another contact group. I'm on current develop code.
Your instance of Friendica is on a pretty old version. It's likely that we fixed a lot of things in the meantime.
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