I just updated from 7.8 to the 7.9.1.

My sets have a lot of props so I always had a little freeze of 4/5 seconds when I stopped the playback. But now, I have to wait almost 30 seconds or more after each time I press the pause button.

I saw that if I delete a lot of props it's getting better, but there was no problem before this update. I'm working on these sets since 3 years and it's the first time I see so much lag, so I guess there's an issue in this version.

Another thing, it must be related to this problem : one of my sets has about 300 billboards (with low sizes linked textures). Despite billboards are really small props, I have less problems if I delete these billboards rather than multiple high rez / high poly props. It's seems like it cannot deal with a lot of props anymore...

Last info : I have zero freeze when using the preview button from the direct puppet tool.
I attached my project's info. With this one I have an exactly 17s freeze when I stop the playback. It was about 30s before I delete some props and about 2 or 3 seconds before the update.