Might be a thing that people get too relaxed while streaming, same way when around people who know them well, who they don't have to worry about being considered racist, so they relax too much and do something strangers will judge them for.
Just 1h ago, my friend said sth about seeing little pet pigs as tasty and I told him some people might consider his dog (who he was walking at the time), as tasty. If I did that in front of 5.000 strangers, it probably would come of as offensive to all dog-lovers.
The only difference is: there isn't 5k viewers watching every dumb thing the rest of us do.