I’ve found removing CA from corners (often the most problematic region) can create terrible artifact in the center of the image, especially when correcting fringing around objects juxtaposed against a bright sky. I haven’t found a workaround in LR for this. I use Lumemzia, a terrific contrast masking program for Photoshop, to select only the color of the fringing and then apply that mask to a Hue/ Saturation layer, then desaturate that color and sometimes increase luminance a tad. It works very well and avoids the artifact LR or camera raw create.