This is absurd. I even tried destroying each and every pipe on my platform and then pasting it with a blueprinted platform. That includes all factories pertaining to fluid creation. All of it scrapped and then pasted via blueprint.

Still wrong all fuel in my oxidizer.

I do think it happens when ...

It keeps happening. Now I managed to snag a save where it happens in a minute or less. I think it happens when I am switching between planets, but might not be so. So keep switching between gleba and fulgora and you should have the pipes in the fulmium labs change to water.

Okay I tried it again ...

I have had the same issue and now I had an issue when making holmium. All my holmium pipes and outputs changed into water (lame factorio jesus).

My setup was pretty spaghetti, so it was a nightmare having to manually change each and every one of them.

There are 2 save files. File where it was ...