Xbox One S - Forza Horizon 4 Disc Load Error

Bought a sealed, brand new copy of the game from a well-known, huge online retailer. All was working fine up until a few days ago when all of a sudden console started reporting that it can’t read the disc. Disc is in, literally, mint condition, not a scratch, not a smidge on it. Sometimes powering off the console helps, but sometimes even that doesn’t help. What gives? All other discs are working fine, except Forza Horizon 4. To makes things worse, we’ve tried it just a few minutes ago, but to no avail. Restarted the console, still no avail. We went to our computer to write this post, left the disc in our console (unloaded), went back after a few minutes and now the game loads and disc is being read like it’s supposed to. Seriously, what gives? Is this a disc problem? A console problem? Any info or advice or help would be greatly appreciated. Thank you.