"One or More Actions Not Bound To A Key"?

So I’m playing CE’s campaign & went to adjust the weapon display offsets for CE & all of sudden I get this notification on-screen saying “One or more actions not bound to a key.” & in parenthesis is says H2, H3, & ODST but it doesn’t say what actions aren’t bound so I don’t know where to look. I haven’t changed anything in those games, settings-wise, so I don’t know what it’s talking about.

Edit: I’m on XBOX One, btw, if that makes any difference.

Any ideas?

If you go to the Halo Support site and do a search using ‘One or more actions not bound to a key’ it’ll return some articles on that issue. Select the first one in the list for instructions on what to do to fix this issue.

Why are we even being forced to set keys for games and game modes we don’t even care about?

I mean, right now - all i want to do is play ODST - but its a bit dark.
so i try to change gamma value and i cant save this setting because some other games have keys unbound (namely forge keys i mean come on wtf?)
I don’t want to have to go through every single game and remap keys i don’t care about around keys I do care about just to change the -Yoinking!- brightness I mean seriously guys what the actual -Yoink-??