Froze on "tell me about yourself" after acing two technical rounds

Cleared a coding round and a system design round without much trouble, then the behavioral screener opened with the softest possible question and I just blanked. Ended up rambling through my whole resume chronologically like I was reading it off a page. I think I'd prepared for every hard question and none of the easy ones. Writing a real 90-second version now and timing myself, feels silly but it's the only thing that's helped.