I have a really weird behaviour on my dashboard. I wanted to use material design icons and found ways to do so in this forum... so i put in "mi-videogame_asset" and everything shows up correctly... so i looked around other icons that fit me (iE "mi-doorbell" or "doorbell" in the links provided - put as soon as i put in them in the same way with the prefix the icon AND the label dont show up anymore.