Not to badger you, but a clean install of 2024 will still enable any/all 2024-based 3rd party add-ons obtained via the Marketplace by default.
Be sure to check this if you have gotten anything, free or otherwise, from the Marketplace for 2024.
For example, I have the Zinertek enhanced ground textures add-on and it was being enabled by default and it was turning my GPU graph purple like you are seeing. I disabled it and that stopped it.