What is this phobia called?
I have a phobia of things like this, and I think they're all related: Glitches in video games or 3d modeling software where something inexplicably expands, or part of the mesh morphs, maybe the texture changes, or proportions are off, or when floating point errors are apparent to the player (like in kerbal space program). In the same vein, in real life it would be things that have a million tiny things that all expand or multiply like the bubbles in coffee or an vicious chemical reaction, or a fire spreading, or watching how all parts in a gun rattle during firing in high speed footage, or ants or insects with many legs, or solids, liquids or gasses changing forms, like metal being cast.