When putting an industrial forgoing machine (the latex processor) on a Mekanism universal cable it will sink all power offered by the cable without increasing the internal power storage of the machine itself (it stays at 0) - basically deleting all the energy.

Same happens when putting in energy storage items (but in this case it could be a bug of the latex processor?).

tesla-core-lib-1.12-1.0.11.jar
industrialforegoing-1.12.2-1.5.10-98.jar

Not an issue related to Mekanism cables at all: The machine just wanted to get nearly infinite power: InnovativeOnlineIndustries/Industrial-Foregoing#127