Hi.
We've rendered hundreds of animation so know how do them.
In the past turning off adaptive light solver has fixed this issue.
I think I fixed this shot by doing a number of things - I'm not sure which one did the trick.
There are a lot more server rooms so I un-instanced the bottom lights which aren't seen and turned them off
I also changed the light sampling to Precise
All of the other shots have rendered absolutely fine so yes, I can only assume the lights are causing it
Thanks