Buildcraft version: 7.99.13-pre10 (using individual modules core, transport, and energy)
Forge version: 1.12.2-14.23.1.2555

No crashlog / log to show, no error generated.

Additional Information:

Active redstone engines removing items from a chest to not eventually heat up and work faster. they stay at the coolest state as long as there are items to remove from a chest. If they remain powered, and the chest empties out, they then heat up, turning from blue to green, then yellow, red, and lastly black. If items are added to the chest, they start working at top speed, but then quickly cool down, and return to the lowest temperature (blue).

Second the bug 6/19/18

This will be getting fixed alongside the MJ rework, it's not forgotten.

Well yes, as the MJ update hasn't been released yet...

This is still an issue.

buildcraft-all-7.99.24.1.jar
1.12.2-forge1.12.2-14.23.5.2772
I meet this again.

Its still not Working. :(

Ok, this should be fixed in 7.99.24.4-pre.2 from the tests page and it will included in the next release sometime in the future (although long before the actual MJ update)

Ok, this should be implemented in 7.99.24.4.