The trial was set for September after the court was told that Griffiths was likely to be "away" during July when it would normally have been set for.
Fiscal depute Dev Kapaldia said: "Having had a look at the case, the court might benefit from further inquiry into the flare.
"I know what they do, but I don't know how they operate. The significance is what the effect of it might be. It came from the crowd onto the pitch.
"I want to inquire further into what effect it might have within a crowded area if it comes back in. The Crown is intending to make this inquiry."
Sheriff George Way said: "Looking at it, it is kicking a smoke bomb or similar item. One would readily infer from that that the flare came from somewhere.
"How does it matter how it works? It is a description of a thing giving off flames, smoke or whatever, and the defence will be along the lines of 'this nasty thing came at me and I kicked it. The scary thing came flying at me and I kicked it.'
"Does it matter if it is a flare, or a smoke bomb, or a pot plant? I just wonder if you are wasting your own time and money?" he asked the prosecutor.