Vehicle Welding Rig =/= Soldering Iron when repairing

It has been a few weeks since I updated but now when I want to repair plastic items my vehicle welding rig they don’t show up on the repair list, despite needing a soldering iron for the welding kit component used to craft it. I have to use a soldering iron from my inventory and reload the batteries instead of using my solar powered rig. Is this a bug or can I fix this with a simple .json edit somehow?