The option to dump biproduct from the Electrolytic Separator cannot be used due to whatever mod has the integrated sorting for inventories. The left toggle works fine, however the right one seems to have an issue, that I don't know is present or not on other machines.

Right Side Toggle

The left side Toggle functions as expected.

We added mekanism to the blacklist for the mod, update to 0.3.13 and no mekanism machines will have those buttons anymore.

I am currently on version 3.10 and it its on all machines to include gas tanks that have this option.
https://i.imgur.com/o9YmXWq.png
https://i.imgur.com/VVSrBPE.png
https://i.imgur.com/ZOf7ajH.png