Burner inserters and machines run faster if their fuel has an acceleration bonus.
Mods introducing new content into the game.
Furnaces, assembling machines, production chains.
https://mods.factorio.com/mod/BlueprintLab_Credomane
https://puu.sh/DZuww/0b3797c062.png
This is a bug in Blueprint Lab, already reported here: https://mods.factorio.com/mod/BlueprintLab_Credomane/discussion/5d407244583730000d4a888a
Interesting. Switching to the Bud version solved the issue, as it seemed to for him as well.