I recently downloaded halo reach on xbox 1 (from xbox 360) and when i signed in to my account I had lost multiple armor pieces and a significant loss of rank. from commander grade 2 to captain grade 3.
Were you connected to xbox live when you were higher rank?
The ranks are stored on the servers
Yes it told me that Ulrick von Lic was signed into xbox live on my 360 that’s what was so strange.