Freeze framing Rotobrush 2

Hi Friends,

Another newbie question unfortunately I can't seem to find the answer for or work out an easy solution for. 

I just started getting into using Rotobrush 2 in after effects and after I have my good roto I can't seem to find a way to freeze frame it. Whenever I do use a freeze frame option whether freeze Frame or freeze on last frame, the cutout roto and footage it was made from don't seem to both freeze, kinds seems like they get offset continuously. Not sure what's going on or how to solve but one idea I had was to maybe render the roto so it was essential just a single layer clip but even that when I tried precompose and prerender gave me issue and I don't think I was on the right track.

Any help greatly appreciated,

- Either how to freeze frame a rotobrush 2 cutout

-or how to render an effect layer of my choosing so it's rasterized into one single clip without the fx anymore since it was rendered.

• If you know how to do both of those I would greatly appreciate it. Thanks so much!