abrigant

I'm getting a weird bug in career mode. I go to the R&D, research the parts, then go to vehicle assembly. I try to attached the parts, but it says I need to research them first. I go back to R&D and the parts I researched previously are still there...but there are now three new parts to be researched again. This process just keeps continuing over and over. I've attached a screenshot of my R&D so you can see what I mean.