Player injured (or is he?) bug?

This seems likely it would have been set by the Research team but I don't know why myself. It's typically something we might set for a player who has an injury/condition that is non-football related or something we can't replicate in game. You can post in the relevant nation thread here: Database and Research - Sports Interactive Community (sigames.com)

I think it has something to do with 'existing injuries' or whatever it's called. I tried to find it in the editor but no success.

I've done some editing and for testing purposes I've started several games now and this happens every time (around july) (I start december 2020).

If I can remember correctly, the player was injured IRL long time during summer/autumn.

No biggie, he was 36 and playing in my B-team, so it wasn't a big loss.

We set unavailability a bit differently from how we would set injuries which may be why you can't find it in the editor, I know there are some additional reasons why we wouldn't want an 'Unavailable' status to be removed so it might not be accessible in the editor.