There are a couple of issues with the engine trails on the Tactical Command Warbird. My ship configuration is all Vastam but with Deihu wings. The trails from the outermost nacelles come from different positions, and there is a missing trail from one of the tertiary nacelles.
Another error I have noticed is that one of the secondary nacelles (only one, not both) changes size with different configurations. I think it might be in the image I've got below, but it can be hard to tell. It is very noticeable in the ship editor when you quickly switch back and forth between the outer pylons.
Edit: Looking at the image again, I just noticed that the trail on the far right is much smaller and thinner than the one on the far left, which confirms that the far right secondary nacelle is smaller than the opposite secondary nacelle.
And another edit: I've just found
this image which has made me realise that my ship is actually missing engine trails from the primary nacelles as well.
I believe all of these issues are specifically related to the primary, secondary and tertiary Vastam nacelles.