The night vision toggle simply isn't working for me.
To put it simply: every time I click on the key it says it's enabled.
Doesn't seem to be able to deactivate for some reason.

I never ran into an issue like that, would you be able to provide a bit more info:
Which minecraft version are you playing?
Which Gamma Utils version did you install?
Which other mods do you have installed?
Are you using another launcher than the vanilla one?

Sorry about the lack of info, my bad.
1.19.2
Gamma utils 1.6.10
Using MultiMC
Many, many mods:
mods.txt

Just tested it out, the same thing in SP.
Don't stress too much about it bro, Sunday I'll probably remove mod by mod and see which one it is.

Thank you for the extra info
I suspect there might be a conflict with another mod
I'll have to figure that one out, I'll get back to you asap

Btw, does this always happen, or only on a server?

Thank you, that would be very helpful. It's probably easiest to first run Gamma Utils with only Fabric API and Cloth Config, to make sure it's actually a mod conflict issue or not.

Good news!! I've updated all the mods and it seems to have fixed it!! Thanks a lot for your attention man! You're awesome! Keep up the good work!

Awesome, that's great to hear!
Thank you too for reporting about the issue and keeping me up to date.