Instead of producing 640 mb/t, it produces 640 mb every few seconds.

I'm guessing this is the dense water source... there was a similar issue before with the cobble generators, but it seemed to be a one-world issue. If you place it down in another new world, does it still generate water slowly?

And do keep in mind that the water/helium/cobble/nitrogen sources don't update every tick - they will only actually produce stuff every four seconds or so, but it should be the right amount per tick on average.

And do keep in mind that the water/helium/cobble/nitrogen sources don't update every tick

I think it's better to change tooltip from mb/t to mb/s then

Made another world, now it's producing a lot of water every few seconds. So it works as you've described.

Ok, good to know - still need to figure out why this issue happens at all. It's very bizarre.