You will notice your baby has more difficulty with the three C’s (clinginess, crankiness and crying) when taking one leap than with the other. Here you can read the reason why your baby sometimes seems to have more difficulties with a particular leap.
It could be because your baby finds the perceptive ability that accompanies the leap very interesting, or because when the leap started, they did not feel particularly comfortable in themselves to begin with. The most important thing is that you know it is very normal for your baby to have more difficulties with one leap than they have had with others. It is nothing to worry about. Do try and figure out why your baby is reacting strongly to a certain leap. Help your baby if they are having difficulties.
Source: The Wonder Weeks Milestone Guide. Filled with questions and answers and handy checklists for your baby’s mental and physical development.