The star Uruguayan striker and record-breaking A-League goalscorer was mysteriously dropped from the bench for last week's game in Brisbane despite being declared fit and in the squad.
And he was been dropped entirely from the squad for this weekend's game at home against Newcastle Jets.
Joyce has insisted he's picked the best team but won't discuss his reasons for axing fan favourite Fornaroli.
Now frustrated fans want Joyce out.
The Melburnians fan group plan a silent sit down protest at the 23rd minute in support of Fornaroli
Their Facebook page is full of comments furious over the direction of the club.
One post reads: "From a coach that specifically didn’t reinforce our attack in the off season, leaving our greatest striker and one of our best players ever out of the squad AGAIN is a humongous blemish on an already damp season with only 5 goals scored in 5 games.
"To say the quality of our brand of football is boring would be an understatement, it’s a miracle anybody turns up. The commentators probably grow tired of it."
The fans are concerned this is the latest in a series of fallouts Joyce has had with high profile players at the club.
The fans add: "Kilkenny, Cahill, Brandán, Jakobsen, Fornaroli - all of these players have clashed with the ego that is Warren Joyce, all but one have left the club."
Talking City podcaster Matt McIndoe added today: "Bruno Fornaroli being dropped leads to questions about Joyce falling out with highly talented and combative personalities in his squad.
"As a fan base, we consistently see a boring, safe gameplan that does not allow for flair. This goes against the ‘City’ way which CFG heavily promoted when they first came into ownership.
"Bruno being dropped and the lack of communication from the club is building into more than just distrust, it’s becoming a massive wedge between a club and an already struggling fan base."
He added: "Questions must be asked and information about why our best player and only recognised striker in the squad is not being selected."