I think, it's the same reason, they didn't fix the warp out animation in general at the intrepid and nova class.
Everytime, you warp out with the intrepid or nova class, you have this bug. No matter, what engine you use.
I think, this bug exists since season 3 and it was reported several times months ago and reportet again and again. no effect since now.
Actually I knew about that bug, and made a separate post on it too. I'm glad it's getting fixed...but do you think these are related? This is an impulse trail issue and that was a warp trail issue, although if there is somehow a little floating engine next to the ship in the code, they might both be the same problem. Interesting.
I actually did warp out once while using it and I had my normal trails, the bugged warp trails, and the bugged impulse trails.
As this bug occurs only on some ship models, like the T5 intrepid or the nova (and delta flyer as far as i know), i would say, both bugs definately belong to the same models. So Cryptic should have a look at these ship models