DoH Appears to not Work on Android?

Non-Standard Elements:
Running Pi-Hole in a Docker container, pointing to a Cloudflared DoH Docker container.

Expected Behaviour:
Visiting should report Using DNS over HTTPS (DoH): Yes

Actual Behaviour:
On a computer, visiting shows the correct DNS/DoH status (Yes). However, on Android phones, it shows DoH: No, however the DNS queries do show up in the Pi-Hole log.

Any explanation for this behaviour?

As you noticed the Android phone uses it's own DoH implementation, so you have to deal without the advantages Pi-hole tends to offer.

I am so pleased with DoH being used everywhere...not.