Flow misses the first part of my word

The flow feature sometimes misses the start of the words that I'm typing. Perhaps I type quite fast and this problem seems to get worse as I speed up. 

For instance, if I type "and" I will often end up getting the word "he". Looking at the (qwerty) keyboard, you can see that the first part of my swipe has been thrown away and the algorithm has done the best it can from the last two letters "nd" and come up with the word "he".