@orschiro - There are a few new changes to both the HUD and MATE Tweak. If you update your Artful instance and restart, does anything change for you?
If it doesn’t, can you run these commands:
killall mate-hud /usr/lib/mate-hud/mate-hud &
After that, do things start working for you? In my case, mate-hud only works properly after restarting it.