I have a new build for you with February security patch. It has all the fixes I added to Lineage (see here
https://forum.xda-developers.com/t/...s-20-0-for-xiaomi-mix-4.4394723/post-88167017) and in addition I also added a kernel patch that will hopefully fix the random multimedia app freezes.
Unfortunately something has changed in the upstream source code and it's broken ANX camera yet again. I'm in the process of trying to fix it but I'm having to hack the ROM source so much to get ANX to work that I feel like I'm fighting a losing battle. I didn't want to delay this update so I've switched out ANX for Google Camera instead. To be honest, ANX is the only thing preventing this ROM from becoming an official version so let me know what you think of this latest build and whether you feel ANX is a must have feature.
Thank you for your hard work on the MIX 4 and in the scene!