I tried Antigravity recently with Flash 3.5, and it got stuck in a loop saying the same sentence over and over. I haven't seen this pathological behavior from other LLMs in months.

Fable in Cowork can get stuck in loops, I've had a single prompt use 83% of a session quota on a single prompt before I realized something was amiss.

Its explanation: "the wasted tokens came from re-rendering the document to verify layout after a page-orientation bug."