Sorry I've not found info in previous posts.

My video appears to have lens distortion flicker- as in pinch and barrel distortion. Very slight, but apparent in final render.  Process of elimination:

- Lens mm is consistant throughout. 15.1mm
- I checked a flicker spot with equivalent files in LR, and the flicker is not there. My lens distortion corrections are consistently applied to all frames in LR.
- Flicker appears in final rendered video and LRTL's preview video.

I'm on Mac Sierra 10.12.6
LRTL 4.7.8 Pro
Shot with Fujifilm xt2.  10-24mm lens

see render:
https://youtu.be/GudFNGhKXRg

see transition from :06 to :07 for example.

Danke.

For me this looks as if you have had Autofocus on while shooting and/or the Lens-Stabilization.
I'm pretty sure that LRTimelapse has nothing to do with this. You can confirm by taking LRT out of the equation. Just synchronize the edits from the first frame to the whole sequence in Lightroom. Then export and render again. I'd bet the effect will be still there.
Next time remember to turn off Autofocus and Image Stabilization when shooting.

I did turn off auto focus, but I will check stabilization. Thank you!!