I'm not sure, I myself can still make infinite water pools.
(I use 2x2 pools)
I have noticed a few weird problems since the update with fire and Wrath Fire since the update tho, might be related perhaps?
(The problem I'm having with Fire is it'll stay on until I restart the world, Wrath Fire is almost the same, it'll just spread a bit (a lot less than it should) then just stay on until I restart the world.)