Certain video frames freezing post-render

Question

Hi there, I couldn't seem to find an answer anywhere so any help is appreciated. Here's the video in question:

So this introduction is using entire sections of stock footage which I’ve composited and edited myself. I’m using Version 15.0.0 and the frame rates are different for some of the clips - however, I’ve changed these and the problem still occurs. In the Statue of Liberty shot (0:00), the footage is supposed to slingshot back, but instead pauses for a few seconds before doing so. I’ve used CC Time Warp and it appears fine in the preview - the problem only occurs once rendered (it's not the glow effect either as I've deleted it and it still pauses in the same spot). Furthermore, the clip at (0:08) of the drone shot flying over the city also randomly pauses before the cash transition, it also appears fine in the preview. Any ideas on what I’m doing wrong here? Everything else seems to run fine. I’m on a MacBook Pro (Retina 15-Inch, Mid 2005), 2.2 Ghz Intel Core i7, 16 GB 1600 Mhz DDR3, Intel Iris Pro 153.

I've tried exporting in multiple formats and nothing changes too, here are some screenshots of the settings on respective videos:

Statue of Liberty [Time Warp]