Per The Athletic:
The Buffalo Bills have banned Chris Brown, their radio host and web reporter, from covering practices the rest of training camp and have suspended him from all their platforms, multiple sources tell The Athletic.
The Bills aren’t talking about Brown’s whereabouts, but he disappeared from practices last week after apparently violating the team’s media policy. Three days later, the longtime club employee vanished from “One Bills Live” — simulcast on WGR 550 and MSG Network — and social media without an announcement on where he went or when he will return.
Brown’s total evaporation occurred Thursday, less than two hours after heralding Barstool Sports founder Dave Portnoy’s tweet about buying title sponsorship rights to the Bills’ stadium.
I don't know how much I can post from a paywall site but he has been suspended according to the article not terminated, it seems like he violated the teams revised 2020 media policy and was divulging too much information from training camp