Fortunately never happened to me on this platform. Even worse for me was when I did a PowerPoint and wrote down the sources in a text document, then closed all the Firefox tabs, saved my PowerPoint, put my PC in energy save mode and when I came back and wanted to continue my work, the PC crashed for no reason and all my sources weren´t saved...
This was annoying af. xD Or when you write a long online form, send it in, get no reply and then you have to write everything new in an email xD