Real Madrid have added Mbappe to their squad this season. The addition of Mbappe has forced Madrid to make major changes to their match tactics and formation. And it is normal that it will take some time for the players to adapt to the completely new formation and tactics. This is why Madrid's performance was somewhat erratic.
All I'm sure about is the fact that Real Madrid will soon bounce back in their performance and there's still high chances and possibilities that they can overtake the Barcelona club in the table standing if they got the chance. Ancelotti still remain a strong willed coach and he is still going to use his experience managing he club for a long while now to make victory for the club. His plans to include the likes of Mbappé this season was a good strategy for the club and I know they will regain their full squad strength in no time.
This is not only about Ancelotti and Mbappe, still more precisely we judge that the Real Madrid team is almost perfect with the quality of the players they have today, it's just that they are currently lacking in good registration among players as well as the cooperation is still not perfect, real Madrid will go crazy again if the players already have very compact cooperation as before.