Hi,
That was 720p, not 1080p.
I think if you set adjust refresh to always and tried this with content that is 1080p, you will get the wanted result. For everything else you would be better off, stopping the currently playing 4k content and then starting the less than 1080p content.
I think the issue is being caused by white-listing. But I don’t think you are going to able to white-list resolutions less than 1080p and get the correct refresh rate. More details can be found here:
If I’m right, this will be affecting kodi across many platforms and not something that osmc is going to be easily or at all be able to fix.
Thanks Tom.