multiple rapid deployments + a force push to master caused the router to lose the domain-to-deployment binding, even though the Domains tab shows the mapping is correct and a deployment is Active
TL;DR
Developers encountered an error where the router lost the domain-to-deployment binding, despite the Domains tab displaying the correct mapping. This occurred due to multiple rapid deployments and a force push to master. The solution is to perform a global cache flush for all deployments to correct the issue.