In 1990, during a showdown between Roddy Piper and Bad News Brown, a Black wrestler, Mr. Piper, who is white, showed up to the match with half his face painted black.

In 2005, Vince McMahon, the chief executive of WWE, used a racial slur repeatedly in a prepared skit.

Until recently, those segments were available to watch on the WWE Network, which allowed subscribers to revisit old episodes and seasons of WrestleMania going back to the 1980s. But this month, after WWE episodes began moving to Peacock, NBCUniversal’s fledgling streaming service, longtime viewers of wrestling noticed they could not find either segment.

“The whole match is gone,” said Christopher Jeter, 30, who has watched professional wrestling since he was 10 and now writes about it for Daily DDT, a news and opinion site about WWE. “I wouldn’t say it’s a big loss.”