Ive seen on another post about this stuff and it said you weren't able to reproduce the issue.

I noticed it was staying at 2 pressure which mine also does but mine doesn't re-use the water in the boiler it takes in new fresh water which it isn't doing at all. I am unsure if it is because of the type of water or just because the boiler is bugged still.

Btw the fluid level on the boiler should be staying at 175

One other thing I'd like to add:

My steam train that worked perfectly before the gasses and fluids update (or as people reference it as the "space update") has 16,135 L of fresh water to be converted to steam for use in the train, even with a pump to try and pump water back into the boiler it still doesn't seem to let a lot of water if any at all.

yet another thing to add even with a massive water tank and a tank for steam to flow into so the boiler isn't filled with steam it still refuses to fill with water.

Thank you for report but on your first screenshot you can see that boiler is full of steam and there is simply no place for more water. Cannot reproduce issue with pumping water in empty boiler:

Thanks for your report. The boiler will only allow water in (it has a filter on the input port) and will not allow air or other fluids in. The boiler has always worked like this. Please avoid feeding anything other than water into the boiler as you will get airlock on the input port.