I have a desalinator next to a salt water geyser that gets fed a constant stream of salt water (about 94C), and yet sometimes the temperature of the water it outputs will start slowly yet steadily drop by around .1 degrees every 7-8 packets, reaching around 50 degrees when the desalinator needs to be emptied. Saving & loading will cause the output temp to jump up a bit, but it will still steadily drop. The desalinator itself is running at around 100 degrees, which is pretty good considering it eventually is working with the force of over three aquatuners! XD
I recreated the effect in a sandbox map, it appears to happen after the desalinator is quickly switched off & back on with automation (but not every time, it takes a few tries)
This happens with no mods running.
Here's the map with it happening in the wild (desalinator located by mid-left border of the map):
Here's the sandbox map I recreated it with:
Hope this helps! Keep up the good work
Steps to Reproduce
Happens occasionally when desalinator is quickly disabled/enabled by automation
This issue has not been confirmed by a developer yet.