Did you change coffee or grind size? Looks like the grind is too fine to me.
Discussion
This can also be.. yes
I had a deLonghi and it did this when I made the grind size too small. I think the deLonghi machines are under pressurized.
Yeah depends on the kind of the machine, DeLonghi is not the top, but has pretty good machine for personal use. But as you say, the pressure is the main important characteristic for espresso machine 🤙
#coffeechain