Before the latest update on 13 July 2021 water would collect in cauldrons that were placed under a drips tone spike/block that had water above it. This had an added benefit of topping up potions that were left in the cauldron - and possibly coloured dyes too, but I never got round to trying this. Now plain water isn't collecting in cauldrons at all. I checked lava and that's still filling up fine. It's was working right up until I installed the latest update today.

Expectations - water would fill/top up cauldrons

What actually happened - water no longer fills/tops up cauldrons

It's a real shame as my cauldren room looked so pretty with all the coloured potions.

Ps. My husband just tested it on his xbox one and his cauldrons are still filling up fine - but I'm playing LAN multilayer on his world. I logged out and he came over to my house/area and all the cauldrons started filling up again. It's really weird.