If a person has left the group in the past, you need to be in their Telegram contacts to add them back.
They can still join via an invite link as long as they are not on the group's invite link as long as they are not on the Removed Users list.
194
Spiacenti, questo utente ha deciso di lasciare il gruppo, quindi non puoi reinvitarlo.
86/194
ravaz,
Dec 10, 2018 at 20:09