No worries! Slrpnk.net was down until a few hours ago, perhaps that broke the alt-text from showing up? Last time it went down, I noticed a banner and community icon I had uploaded from slrpnk to a community on a different instance broke. I was surprised to learn that it had been pulling those images from my instance the entire time instead of it being stored on the outside instance, so maybe the same thing happens with alt-text?