I wouldn’t expect any support for Gears 3 at this point.
Your probably right unfortunately,
Sadly. But that’s an old game from a different company.
Would clearing my cache on the Xbox one help?
I recall statements from TC that they didn’t have a testing environment for the 360 era Gears games and as such cannot support them. Not sure why but they always explained them not being able to go back and fix things in them with that.