A bug appears to be preventing Twitter’s new Fleets from disappearing after 24 hours as they’re supposed to.

Twitter introduced Fleets on Tuesday, as a way for users to send tweets that disappear after 24 hours. The goal was to lower the barrier-to-entry, making it easier for individuals to start conversations and share their thoughts without the pressure of it being permanent

Unfortunately, it appears a bug is preventing Fleets from disappearing as they’re supposed to. The bug allows anyone to download a person’s Fleets, without them being notified.

TechCrunch reached out to Twitter for comment and was told the company is aware of the problem and is working on a fix. In the meantime, anyone counting on Fleets disappearing may want to hold off before using the new feature.