Why is my Windows laptop not querying local DNS server?

I have a local PowerDNS server on a Linux box. I can access it fine on my Windows laptop under Windows Subsystem for Linux (WSL). dig @main probitas returns the expected address. ping probitas and lynx http://probitas also work on WSL. Windows DNS settings are configured to use the local server, but in Windows Firefox http://probitas fails and ping probitas on Windows terminal fails. The Windows network adapter first DNS server 192.168.0.100 (local PowerDNS server) and second is 192.168.0.1 (router). I can access the Internet, but Windows does not seem to use the DNS settings I entered. What's

Question by ariel on Super User, licensed CC BY-SA. We show a short excerpt and link to the original thread as credit.