With auto-fuel on, cooked meat disappears if accidentally right-clicked into a BBQ or cooking bench. There are still issues with it being the wrong amount of fuel added, but I'll try to document that more fully in another bug report. This one felt more urgent because it could affect new players who don't know about the auto-fuel system.
I haven't tested this on Survival or Scourge, but it may be an issue on those servers as well. I'll ask on Discord.