: Xbox one keeps disconnecting and reconnecting instantly to xbox live

: Xbox one keeps disconnecting and reconnecting instantly to xbox live
Hi there my brother has been experiencing this issue for the past couple days, has never happened before this, however his xbox keeps disconnecting and reconnecting from xbox live causing him to get bans on a few games he plays for abandoning the match.

Have tried things such as restart xbox, router, both at same time but to no avail. The xbox is not far from the router and our other xbox in the house does not have this issue.

:)