I don't know much but for a player who hasn't trained with the first team for a while, he also had time off earlier this year after his partner had given birth to the couples first child, hence him not being involved in any U21 games. Further to this he was doing gym work to keep his fitness...
Holla is still contracted to the club but hasn't been involved in first-team training for a number of weeks. He's been on the transfer list since last summer