One highly consistent signal is the growing feeling of "I absolutely cannot take a break right now", entering the burnout phase when I start feeling frustrated

One highly consistent signal is the growing feeling of "I absolutely cannot take a break right now", entering the burnout phase when I start feeling frustrated or angry when someone else suggests I need to take a break. I suspect this signal is reliable because it correlates with how much I'm over-indexing on the Current Critical Thing, leading to reactive & pigheaded actions and the loss of broader perspectives.