VFX filmmaker

I am looking for a VFX artist or person who knows Rottoscope. Task is to remove transparent visible thread from 3 shots of my short film. Please take a look at the screenshots. Duration of the shots is less than 30 seconds. There is a thin thread that we used to pull the robot and it is visible in some shots due to light reflection. I tried to remove it in Davinci Resolve with Masking Teachnique. It worked in one shot but in the others the grass is moving so it is difficult to do the same.