He moved to Chelsea during covid restrictions and wasn't able to train with his teammates as per the below BBC Snippet:
He was unable to play and train with his new team-mates as Chelsea abided by the Premier League's five-step review process, an investigation used during transfers for academy players before they can be registered to ensure everything is above board with the move.
While his new team-mates went to win a pre-season tournament in Germany in the summer of 2022, strengthening their bond, Dibling was training alone with a coach.
That isolation was a large reason for him struggling to settle and the clubs were still in negotiations over a fee when Dibling made his desire to return to Southampton clear after just six weeks.
He was in the team regularly until he played at Old Trafford, where he was the best player on the pitch, looked like the only player who was of United quality on both teams.
He terrorised Martinez and was unlucky not to score, was close on 2 attempts looked like they were in from the Stretford end, he then got injured and was out for a few month and due to there fate being sealed months ago, he has been drip fed back into the team, somebody will sign him this summer as he has 2 years left on his deal and his value is at it's highest.
I feel he is going to be a great talent, fast, quick dribbler, press resistant and creates chances, he stood out massively in this team, I know they are one of the worst PL teams ever, but young players normally get dragged down by this, he hasn't, shows more about his character than anything else.