Hi Martin,
I wouldn’t worry at all about this problem,some people find theae drills really helpful for their understanding and feel of timing and others find them more difficult.
Its just one different way to help your timing, but by the sounds of it your timing during normal play is good anyway. What might be quite good is trying to get someone else to drol the ball from a fairly high point for you to try the drill and this could be helpful for you.
Give that a try but definitely don’t worry, there are lots of other drills to help improve timing such as this one-
