AI Video Generation Glitch: Marching Band Mutates Into Nazis After 10 Extensions

Djinn2522 · reddit · 2026-08-13

A local AI enthusiast testing the Wan2.2 model (via Wan2GP) repeatedly hit the "Extend Video" button about 9 times on a prompt of a traditional marching band.

Because each extension builds upon the previous generation rather than the original prompt, the video degraded quickly: instruments deformed, faces turned into white masks, and the band members eventually bore a bizarre resemblance to uniformed Nazis. The author could not reproduce the bias in subsequent tests, highlighting the unpredictable nature of current video generation models during long iterative sequences.

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