Using Kszaq's builds 8.0.1e - 8.0.1h I find it necessary to turn off the Adjust display refresh rate option in Kodi settings. In previous builds I set it to Always or Start/Stop. With the setting on in these builds I have long delays switching channels, random crashing on video start, etc.
I guess the question is, should LE be doing the refresh rate switching even with the option turned off? It certainly seems to be, at least according to what is reported in Codec Info. I guess I don't have a good grasp as to what the option is actually supposed to do.