Last week I saw that they released an update and after run the regular update command:
$ pihole -up
Almost every subsystem was updated, except pihole core.
I was running pihole core version 3.2.1, the new one is 3.3.
Looking at support page I found a know bug when updating from exactly this version.
What I had to do:
$ cd /etc/.pihole && sudo git fetch --tags $ pihole -r
Now everything was updated and running sweet.