Looking for some insight.... I've made pizza at ~600 degrees multiple times with great success (PS legs up, grate, raised grate, stone). Today I fired up a new batch of Wicked Good lump, all of which was baseball sized or larger. Almost zero smoke while heating, hit stable 600 in about 30 min and was ready to roll. Normally when I open the egg at this temp I have a glowing bowl of lava. Tonight that was there but I also had tons of flame billowing up around the outside of the PS and into the dome. Even after carefully burping, I was still getting flash backs, and flames stayed up as long as the lid remained open.
I'm still new to this so maybe it's normal, but it's never happened before.
Bottom vent about 30% open, DW top on and open all the way.
Not at all windy - I would have expected something like this on a windy day, but not even a breeze.
Pizza came out fine because flames stayed at the edges, but I was a little concerned about the gasket, which was in the flames.
Only thing I could come up with was the lump - that's the largest I've ever used and the only thing different than previous cooks.