Rendering smoke/fire bug?

Hello! I just registered because I have this weird problem and I researched on google but cant find a solution

It seems like there is some sort of rectangular object blocking smoke but I have nothing there, it also only happens after some time (first 60 or so frames of the animation are OK and do not have the bug)

No ideas?

Should I post blender file or something?
Should I post this somewhere else, or?

Should I post blender file or something?
Of course you ALWAYS should

here is the blender file: https://dl.dropboxusercontent.com/u/52953317/bugrender%20at%2060frames.blend, if you render the 61. frame you can already see the problem

Anyone, please?

Still waiting…

No idea, I can confirm that I did get the same problem on frame 61.

humpy bumpy

soooo, I still havent solved the issue :frowning:

thank you very much, kind sir!