Working on a 27 inch Imac. Creative cloud all up to date. When I save photos to lightroom from PS it as if I've applied a midtown lightening curve on everything. I've recalibrate, optimized, ran disk utility, I've been doing it the same way for years and all of a sudden the color is off.
I suspect that your Preferences are set to automatically apply auto tone on import. LR has a bug that applies it even on files returning from Photoshop.
Preferences dialogue; Presets Tab, first checkbox from the top.
THANK YOU so much Hal. That was it! Don't know how that got checked.