I managed to get a glob of ice to generate in my steam output and it seems it will not melt. As such, all the drops of water that land there just increase it's mass, rather than pooling as water. I've got the ice glob higher temperature than it's melting point, but it refuses to melt.
Edit: Added image to show the item of ice and its current temperature.
Steps to Reproduce
Cool steam enough that it will freeze and release it into an enclosed area.
This issue has not been confirmed by a developer yet.