According to The Verge on Monday, while updating its policies, the micro-blogging website also censored the "bisexual" hashtag under its adult content rules.
The biggest updates on the platform included abusive behaviour, self-harm, spam and related behaviours, graphic violence and adult content.
Angry Twitterati posted against the move.
"If you search #bisexual and click on photos or news there are no results. This is bi-erasure. @Twitter has done this. We exist," tweeted one user.
The updates last week were part of revamp to Twitter's policies surrounding online abuse.
Reacting to the latest controversy, Twitter posted: "We've identified an error with search results for certain terms. We apologise for this. We're working quickly to resolve & will update soon".
Earlier in October, Twitter CEO Jack Dorsey had said that the social media platform would take a more aggressive stance in its rules and its enforcement of them.
Dorsey, in his announcement which was a response to the #WomenBoycottTwitter protest, said that the platform would develop new rules for things like unwanted sexual advances, non-consensual nudity, hate symbols, violent groups, and tweets that glorify violence.