Random fire in middle of room?
 

Sometimes, in the middle of a place, not neccisarilly inside, there is a Black or normal fire. Is this a bug?

Yeah it's a bug. It's been going on for a long time now.....

A long time, as in pretty much the whole time that POTCO has been running. Its been here for ages, and I doubt it will ever get fixed. Sometimes you can also see little fires or fury cannonballs in the sea.

The little fire cannonballs in the sea happens when a ship is sunk at the exact time it fires a cannon. I've seen it often.

I remember someone saying.. "OH MY GOD IS FOG BELL!!!" When some fireshot was in the ocean.

But they should fix it.

Lol Seaking! In SvS I see Fire, Fury, and sometimes a Broadside! In rooms I see Blue or Red fire.

seen this lots of times nothing new.

Using Flaming Skull and Addled Elixir has something to do with those random flames, but I don't know how it's done.
The black color of the flame is due to your graphics option.
Also, in the older days of POTCO, when hull panels burst into huge flames, you would occasionally see those massive flames. I found this first when the Navy Dreadnought, for some reason, used to be the only ship that had the flames (on my game, at least...)

I suppose this is one of the few bugs Disney is smart enough to ignore for now, because it's not really a big issue.