from MultiMC Log:

[main/ERROR] [jei]: Fuel has no burn time (0): 1xitem.actuallyadditions.item_dust@6 actuallyadditions:item_dust

running 1.12.2-r126

Does this only happens with this one item or with some more?

This wasn't an issue, per se. As I had not tested or even 'try' to burn dust as fuel in my sessions., however I saw this in my log and figured I would share for you.
Dust was the only AA item listed in this error list (two others were unrelated mods).

@mezz What exactly causes this error line?

This logs when TileEntityFurnace.isItemFuel returns true, but the item has 0 burn time.
Maybe something it's oredict with is burnable, but it is not?

That case seems impossible to even happen... simply because isItemFuel is just getItemBurnTime(stack) > 0;, which if the burn time was 0, could never be true.

Launching the game in MultiMC, was just sitting in the log. Wasn't a crash or even an issue for me.
Unless of course you mean "why the error" I am assuming the configs had a marker that it can be fuel, whether by accident or changes in some code through versions.