Can't turn off Files On-Demand in OneDrive

Open settings, "About" tab, check the "Get OneDrive Insider preview updates" checkbox, wait 10 mins, try unchecking "File-on-demand" again

I have selected "Always keep on this device" from the location shown (main OneDrive icon, see screenshot), and it seems to be working as if the Files on Demand checkbox was UNSELECTED although it stays checked (the behavior is there, just not unchecked in settings). As I sync other folders, they now download as I add them.