Overlaying research items

The research of the Ship Drydock is blocking / hiding the Biogas-plant, I mean the Biofuel research

I don't recall vanilla game having a Biofuel research node, if it is from a mod, please also kindly mention what mod what research tree the Biofuel is from.

Hey Luminiel,

in the Screenshot U can see what I mean:

That is vanilla, without mods