The WB tool in develop persona seem not to work.
If I merge visible, go to develop persona, select white balance tool, click on the left area “ORIGINAL”, the WB slider in basic panel shows a certain WB shift (-13%, -9%, …).
After apply and re-enter develop persona, the tool again shows a WB shift, a tad smaller than before.
I would expect that the WB gets fully corrected in first iteration, and further iterations show zero.