Comment 6 for bug 1863613

Apparently there is some issue related to fontconfig cache affecting some snaps (not only spotify), in some environments.

This suggestion by @aphoenix in Manjaro's forums solved the issue for me:
https://forum.manjaro.org/t/spotify-suddenly-not-working/125237/14

sudo rm /var/cache/fontconfig/*
rm ~/.cache/fontconfig/*
fc-cache -r