Will have a lookI tried clearing the default data and cache of the dialer app, but that didn't help. I installed another app and installed it by default (Simple Dialer). That helped.
To repeat this error, you just need to put your hand to the proximity sensor and call at that point.
Thanks for your advice. I tried a restart and unfortunately the animated lineage logo at boot up just stayed on permanently so I had to do a re-install of the ROM. This was OK except I have lost recent Whatsapp messages. Anyway the original problem is resolved and fonts now look normal.
I also have a Mi A1 phone with Lineage 17.1, but wifi calling doesn't work on that either even though it is enabled. The message I get when making a call with no network signal is shown on attached screenshot.
This man is a legend, without him, this rom would have half of its functionality brokenActually it was my initial idea bringup up oss audio primary "that ended up fixing the mic on speaker mode with also https://github.com/a-huk/device_xiaomi_daisy/commit/5e4dd269c28c703523cae0f44603479687e02aa3" and oss camera hal "co bringup with anorton"
Btw i'm happy that i contributed much on this device
#include <std_disclaimer.h> /* * Your warranty is now void. * * We are not responsible for bricked devices, dead SD cards, * thermonuclear war, or you getting fired because the alarm app failed. Please * do some research if you have any concerns about features included in this ROM * before flashing it! YOU are choosing to make these modifications, and if * you point the finger at us for messing up your device, we will laugh at you. * */