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.
Build isolated tiles, conveyor rail and some ice makers. Send some ice on rails through isolated tiles.