Copy of a message by Olaf on the Technical board:

Recently a new bug emerged in Lingua Libre. When a user is recording words, the recordings are uploaded to the server. In the next step, they are supposed to be verified by the user. If there is a network error in the recording phase, the user can click a button and request uploading them again. This time, however, the recording is not stored on the server for verification but uploaded prematurely to Commons. This is dangerous because if there were any problems in the pronunciation, the user had no chance to detect them.