Sorry, can't not agree with this the saga has gone on too long. Hope I'm wrong but I think Isak's days as a magpie are doomed. Even if he does have "slight thigh injury" why would that stop him from travelling ?
Maybe I'm way off base but there's no smoke without fire. The below says it all for me.

https://www.youtube.com/watch?v=QnB4vV4wrt0