Ok, done some testing. Although I havn't tried caching yet.
I have used the timeline corrector on 1080p Prores 422hq projects and 1080p h.264 projects and some with a mix of codecs and OFX plugins and the timeline corrector seems to work.
The project in question however just crashes everytime I link up the corrector node to the imputs and output. I have removed all instances of Neat Video as well and the same thing happens.
What I have noticed is that on the project in question is that there are two imput/source boxes on the left side of the Timeline Node space. All the other projects just have one.
I'm not familar with Resolve enough to know what that means. I have skimmed through the manual but not found anything on why there would be two imput boxes on the Timeline Node space.