Retool change history: Front-end assets from retool-edge.com failing to load for some customers

Retool reported a major outage preventing some customers’ Apps from loading because Comcast Business and Optimum (Altice USA / Cabelvision) blocked retool-edge.com. It began at 2026-05-05 23:59 UTC and lasted 2 days 15 h, resolving at 2026-05-08 15:38 UTC after all affected ISPs confirmed the domain was no longer blocked.