Tutorial popups show randomised nonsense

I'm presuming it's the tutorial popup as the dimensions & context seem to line up with the post in #dev-updates. I haven't managed to get a screenshot, as when I tried to it dismounted the entity being used to display the popup and I can't find a way to re-open it or any other instances of the popup around the island (tried on two different accounts), but when going near, for example, the Cyber Monday cosmetic bundle board, the screen dims and a (roughly) rectangle of randomised pixels appears unless you dismount.

It's possible this is a Fast graphics-only bug as it seems like the popups are rendered using shaders and some shaders need Fancy/Fabulous applied to take effect.

If it helps, I'm running 1.20 vanilla, on a laptop with an Intel i7 and 16GB of RAM (no GPU, using integrated graphics).