No idea why, the mod allows much faster time warp if I'm not doing a maneuver, but with one the max is always 10x. I'm new to these huge Dv burns and maneuvers but I feel like you should definitely be able to do this, are there settings for background thrust somewhere that I'm not seeing? Also the game kindly crashed while I was taking this video.
I am also aware that the maneuver in this video isn't very necessary, since its just directly to target, but I'm still curious about this issue in more complex maneuvers.