Emojis Stop Working After Restarting Ubuntu (fonts-noto-color-emoji)

Here is a topic related to a bug that you described.

https://bugs.launchpad.net/ubuntu/+source/fonts-noto-color-emoji/+bug/1859926

I fixed it using denshigomi's suggestion:

So far it seems a permanent workaround is to create a symlink to the noto color emoji files in the current user's ~/.fonts directory:

$ shopt -s dotglob; mkdir -p ~/.fonts/truetype/noto; ln -s /usr/share/fonts/truetype/noto/* ~/.fonts/truetype/noto