Orbit and speed drops once timewarping

I was doing a rescue mission and when going back to orbit, I found that my orbit was randomly dropping when time warping, and after a while I started going in a straight line, then another drop and another... And It never stopped doing that.
Here is an image of the line:
https://cdn.discordapp.com/attachments/570416009396355072/863377293421838336/unknown.png