As you can see in screenshot whenever ices goes through insulated tile it gets isolated tile much, much colder ignoring low thermal conductivity.
I was wondering why I suddenly got so much water after building conveyor rail. After some time I noticed that the problem was insulated tiles which melted ice and got colder and colder every time ice passed through it.
Expected result: Ice don't gain temperature, insulated tiles don't get so affected by material on conveyor rail.
Current result: Ice gets warmer and eventually it melts, insulated tiles rapidly lose temperature.
Steps to Reproduce
Build isolated tiles, conveyor rail and some ice makers. Send some ice on rails through isolated tiles.
This issue has not been confirmed by a developer yet.