At times I am unable to add BIAS Subs that I select. I am forced to close PI and relaunch PI before the problem goes away. It usually occurs after I make changes to WBPP. I don't recall seeing this issue in the old BPP script.
Running Win 7 Pro w/ all patches and updates. I know Win 7 isn't supported but I recall seeing other posts about Win 10 having the same issues.