This happened a few times today - I'd add an adjustment layer above my clip, and then grade it using the white balance and tone options located in the Basic Correction section of the Lumetri Color panel. After getting it setup how I like I'd play through the clip to make sure I needed no more changes. But this time when I select the adjustment layer it shows that all of my Tone corrections are set at the default '0' while my White Balance corrections still show the edits I made. The adjustment layer still visually has all the edits made, but can't figure out why all the 'Tone' options are at 0. This is a pain since I'm duplicating the adjustment layer to other clips and then needing to slightly tweak them.