oh..the addon don have this feature yet.
type /oibi in chat to show / hide the item level in bags.
I have tested, I can set focus via right-click>set focus with this addon enabled. So, your problem is the conflict of this addon with your other addons.
just try inspect a few times
It is Blizzard issues.
No, I have tried it.
fixed in v6.5.4
fixed in v6.5.3
/reload will work