Why is my Navball's delta v bar red and not green at maneuvers?

[Supernova]

I have built a few spacecrafts after watching many videos on youtube and I successfully landed on Dres and even Moho already (without returning though). However during these missions and also my current mission to Moho with a new or modified spacecraft I ran into a problem that didn't seem to occur in the videos I've seen. I don't know if it's somehow caused by the Nerv engines or whatever but whenever I set a maneuver, no matter how big it is, the curved Delta v bar to the right of the navball is completely or half red (instead of green) and the estimated burn time is completely wrong aswell. When I start my burns at about half the time to the maneuver as the estimated burn time so that the burn splits into 2 equal sections before and after the maneuver node, my resulting orbit is quickly WAY off the planned one.
My burn is about 600 delta v and I have about 7000 with my current spacecraft so fuel is not the problem!

Does anyone know what's the reason for this .... bug? This way I can't go to Moho or at least it's never as efficient and comfortably as in the videos I've watched.... annoying

[Chibbity]

Nerv engines don't play nice with the new DeltaV bar implemented last patch.

(More specifically I think it's multiple Nerv engines? One might be fine.)

A hot fix is incoming soonish.

[Supernova]

Originally posted by Chibbity:

Nerv engines don't play nice with the new DeltaV bar implemented last patch.

(More specifically I think it's multiple Nerv engines? One might be fine.)

A hot fix is incoming soonish.

Ah okay thank you for the information, I've now patched back to 1.4 and everything works there. Thanks again

[Chibbity]

Not a problem!