after updating to plasma 5.5 today morning I lost the favorite applications lists in
kicker (the K/Fedora starting button), it got empty with the exception of konsole.
I am not sure if it is related with the update, and at the same time it is not annoying
because if an application is favorite it should not be hard to remember. :-)
I have re-added the favorites and it now works.
As I said before I am not sure if the cause for disappearance of the favorites was the
upgrade. Other than this issue I am an happy camper. :-)