Lighting changes when rendering the same sequence at different moments in .exr

[alba_abellan_gomez]

Hi there. I've been trying to render an animated scene I lighted. When I run a render sequence, it looks good. But when I reopen the program in a different moment to continue rendering the exact same sequence, same settings and everything, it looks different than the first time. And the weird thing this has happened giving me even three different results.

I've tried rendering in a different computer and the same happens. Sometimes when I hit "update full scene" it changes the way it looks even when no changes have been made, and I don't know why. I render in .exr because I'm using Noice denoiser, so the color management stuff can't be causing the problems. It's like the color, intensity or volume of the lights change and I don't know the reason. I'm using light linking for two specific lights, but this has been happening since before I used it.

Here you have an example of what's happening. It happens all over the scene. The scaffolding looks more specular in some, the color of the lights and the volumetric looks different in others...

Any help is appreciated. Thanks.