So does it idle forever at "technically"enough fuel to not go cold?

Heating Tower Temp
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First attached Heat pipe Temp
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Second Heat pipe Temp
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Closest Heat Exchanger 'working' while producing nothing
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Third Heat pipe Temp
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Fourth ...

Seeing a bug on Heat pipe elements where the Temperature is not properly calculated and can soft-lock fuel insertion.
See attached blueprint:
Heating Tower is configured to insert fuel at < 503C, however Heat Exchangers and Heat pipes are not properly drawing Temperature off of the Heat Pipes, so ...