A user opens your dashboard, then opens it again in a second tab, then leaves a third one parked on another monitor from yesterday. Their access token expires. All three tabs notice at roughly the same instant, and all three fire a refresh request against your auth endpoint.
Source: [Dev.to](https://dev.to/grimicorn/the-web-locks-api-one-tab-does-the-work-the-rest-wait-12om)