So i open up all my images in the develop pannel, I edit the first one and sync all the images with the same crop and edit.
Before I open them in slideshow i check they are all synced and are all cropped to the same settings.
Then when I put them into a timelapse there is always uncropped and uneditied ones at the start of the timelapse, even though when I check back in the develop and slideshow pannel they are all cropped and editied.
It looks like a bug when Lightroom just decides to remove the crop and edit on the first few images for some reason.
I tried to explain this as best i can.