On Wed, Oct 16, 2019, Jason A. Donenfeld wrote:
> Android 10 sometimes tries to forcibly enable the DNS-over-TLS or
> DNS-over-HTTPS setting. Maybe try disabling that. Another gotcha on
> Android 10 appears to be the Data Saver setting.


Yep, that was it.  Disabling the "Private DNS" system setting, all is
well again.

--
Mahlon E. Smith  
http://www.martini.nu/