What are the reasons the proceeding visits may not match the visit count of the next interaction?
The proceeding number of visits may not be the same as the number of visits shown for the next interaction due to a limitation in Matomo. If you use for example the events or the content tracking feature, then the number of visits may not be the same. For example, this may happen when the user performed an event as the second step, but not an actual page view.
(In Matomo 4 this behaviour may be changed.)