Azure Pipelines Generates Invalid Numeric Hostnames for Docker Containers

There is an issue occurring with Docker instances running a NextJS application hosted in Azure. Recently, since more than a week, some instances are generating hostnames that consist of numeric values only, resulting in an error: TypeError [ERR_INVALID_URL]: Invalid URL.

Examples of Hostnames

• Invalid: http://325902417774:3000
• Valid: http://36eef819fd94:3000

What could be causing Docker to randomly generate these invalid numeric-only hostnames, and how can the hostname be configured to ensure it is always a valid alphanumeric value?