I was just holding AD button or mixed normal aerial and at the end of the clip where it slipped of in front i used manual boost, Also dribble state was showing catching and adjusting for ad it was kinda blinking between those two but when it was infront it was just catching.
The [Dribble Bot] is currently missing some functionality like boosting and it has some problems when using it with an [Air Dribbling] mode, so I would suggest using a non-air dribbling mode to dribble at the moment.
The ball sliding off from the car is probably because of the fast switching between the states and the values that you have:
Catching Offset = 51.000000
Catching Approach Offset = 47.900002
Carrying Offset = 46.900002
Carrying Approach Offset = 157.500000
Carrying Auto Boost = true
Adjusting Offset = 58.400002
Adjusting Offset For Air Dribbling = 31.200001
You can use the default ones and let me know if you have the same problem
Catching Offset = 15.000000
Catching Approach Offset = 10.000000
Carrying Offset = 35.000000
Carrying Approach Offset = 20.000000
Carrying Auto Boost = false
Adjusting Offset = 83.000000
Adjusting Offset For Air Dribbling = 20.000000