[the_scotsman]

Well I think, at least fir now, I've solved it, for myself anyway.

I added a 1 second delay after the change of refresh rate in Kodi display settings, and I haven't been able to make it happen again since.

It may just be fluke, or it may be legit. But I've been forcing it to happen by playing all sorts of files that I know would normally cause it to happen, and it's not happening.

So I'll leave it with this 1 second delay and see how it goes.