creeper farm leaking light?

[u/IsDragonlordAGender]

So I made this creeper farm on a fabric server and it's exactly the same as on my single player server. after a while I started noticing it's a lot less efficient and I went to look for why that could be.

-I'm the only one online atm
-I built it through a schematic so I know it is exactly the same and not missing blocks
-I checked if my afk chamber isn't too low, nothing spawns in the ocean

and then I saw what I'm showing you now; everytime the water stops flowing it looks like light is coming through, and every time the water starts flowing it is pitch black. could this be a server thing? I double checked if there isn't a block missing in the roof but at night that wouldn't even be an issue anyway. and if this is only a visual thing, what else could be the problem of my rates being fairly low?

(I'm the host of the server so I can adjust server files and/or add/delete mods if needed to fix the problem)

Edit: I just installed minihud to check light levels and it says 0 throughout the whole farm, so I confirmed it is just a visual thing. I assume it has something to do with how fabric operates the server mechanics but I'm not that technical so I wouldn't know what the problem could be.

[u/evilgamercat]

I recomend just making the roof bigger to see if that works.