One light on flicks off others?

[BadBilly]

Rendering a scene with "lightning" (driven by a simple octane light) which was working fine in look dev renders, but on final renders, when the lightning flashes, other lights lose their power.
So instead of adding light to the scene, its like it drawing all fill light.

All lights have shadow visibility off (plus the two main ones do not obstruct each other), and I have been playing around with the light ID's and I can get some lights to work/ stay on but not all.

Here I have lights with Light IDs 4 and 20 enabled


When I enable light ID 1


Video of the issue:
https://i.imgur.com/mjjcqc5.mp4

am using Path tracing kernal, have played around with literally every setting, including switching to direct lighting kernal, and still have this issue.
Is there something I am missing?

[BadBilly]

A note : I thought I fixed this as the lime stayed illuminated when the lighning flashes - but with each "pass" the lime and cork actually grow darker.
My only work around at the moment is to do seperate renders and overlay the clips and do "lighten" blend mode in post.

[bepeg4d]

Hi,

Did you play with Sampling rate of each light source?

ciao,
Beppe