I accidentally found this when I place many pitcher pump in my petroleum pool and find an abnormal cool area.
When pitcher pump is half placed into petroleum or crude oil, the temperature will automatically but slowly decrease. It is slow enough that can only be observed by tens of circles or by ctrl-U fast mode.
It may occur with other liquids. In my experiments, petroleum and crude oil works, but water not.
Tip: If you replace the air with hydrogen, this phenomenon will be more significant
the first row is crude oil and the second is petroleum.
different column represents different air density (1g 10g 100g 1kg 10kg 100kg)
Steps to Reproduce
enable Ctrl-U fast mode and watch the temperature overlay
This issue has been fixed in either a future version or updated in a previous version.