Describe the bug

1. What did you expect to happen?

Liquid metal should cool at the same rate in vessels and ingot or tool head molds

2. What actually happened instead (i.e. what was the bug)

A vessel of liquid metal cooled and became unable to pour before the first cast ingot was cool enough to break out of its mold.

3. If it was a crash, upload the full log file (latest.log)

No crash occurred.

4. If they would help to explain the issue, include screenshots

No screenshots needed.

To Reproduce
Attention to detail is important!

1. Place lots of copper pieces into a vessel (at least more than 1000 units)
2. Place vessel in pit kiln and light put kiln
3. Once finished, continuously pour as much liquid copper into ingot molds as you can
4. When the vessel of liquid copper cools and becomes unable to pour, check the temperature of the most recently cast ingot and the first cast ingot.
5. The first cast ingot is hotter than the last cast ingot.
6. The vessel has cooled solid and the first ingot still cannot be broken out of its cast.

Meta Info

• TFC Version: 0.21.3.56
• Were any other mods included? Can you reproduce it without these other mods?
  JEI, WAILA, JourneyMap. Did not test. Seemed irrelevant.
• If necessary, what other mods (including versions) MUST be present to experience the bug?