My guess is its some sort of attitude issue and he's been told to go home early and have a think about what he really wants with his family. Does he want to be a footballer or not? I'd hazard a guess the club will give him plenty of space to figure it out for this pre-season but if he doesn't show the dedication that is required, I highly doubt he will be contracted for next year. At the very least if he does have an attitude issue, in a year where we have a lot of players out of contract, he won't be close to the front of that queue in getting extensions.
FWIW I think we have 25 players out of contract at the end of 2021.