Yeah, w.r.t the Gould Inventions, he and his engineered had tinkered with the mechanism too much. The result is pretty charming, imo.
Other examples
Horowitz breaking a string during the Rach 2nd Sonata. Gilels breaking a string during the Liszt Sonata. Gilels actually finished the performance; he compensated by changing his phrasing around the broken string!