Facebook reported that Instagram users sent their passwords to the URL as plain text when they used this feature. For some reason, these passwords were also stored on Facebook servers, but the notification said that the data was deleted and the tool was updated and not done again.
In a statement, a spokesperson may have explained the account information, although the question affects only a alar small number of people güvenli, but they are using a shared computer or a security-violated network. If you haven't been informed yet, your account wasn't explicitly affected, but in a situation where it's as important as account passwords, a problematic security hole appears.
The best solution is to use a password manager and use Instagram's two-factor authentication.