prior to clicking on the synth, let's say to uncheck the "enable midi out" with a right click, the focus was on what I was working on -- OTHER TRACKS, a group of tracks, a selected time range, anything proper for focus.
After clicking, the focus was on the FIRST midi track for that synth, although it may have 16 associated midi tracks, or even more if more than one midi goes to the same synth channel. (edit) -- maybe not always first midi track -- one my my 5 Kontakt instances the focus goes to the 12th of 16 tracks .. can't figure out why. The other 4 Kontakt instances, focus goes to the 1st of 16 tracks.
I can't swear this is new to Kingston ... like any disconcerting thing, you don't notice it until it happens. But I think it is. One consequence of this is not only does the focus change, the entire track view changes when you have a large project, more tracks than fit the screen, and the focus is suddenly at the top when you were working at the bottom, or the focus is suddenly at the bottom when you were working at the top.