Challenging from position with direct invite in Lichess App without need to send url.

[cosmopax]

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So I play my sons a lot giving them odds and I world love to send them invites to a new game in the appwhen they a are offline without the need for an url (or without the need for clicking on past games and so on).
I generally feel the challenging function (for example if no games have been played previously against someone or the other is offline) are a bit quirky, especially when no time limit is chosen. Thanks, much appreciated, Pax