i am using the home xbox feature off of my brother console. i am still getting all the game benefits from it but just today it started prompting me to buy xbox live/core if i want to play multiplayer games. his xbox still has it active but mine is no longer working.
#prompting to buy xbox live/core
sick quarry
upbeat tartan
a few people have mentioned this so seems like its a bug. Make sure you report it. By reporting it they then be aware of how many people are effected, has its not effecting everyone. Why thats the case and helps them fix it.