Whenever i open an image in Photoshop via Lightroom (e.g. Right click image > Edit in Photoshop) it appears more contrasted. I've tried updating Camera Raw, Lightroom and Photoshop to the latest versions but that didn't fix the issue. I've also checked the colour settings and both Lightroom & Photoshop are set to Prophoto (images attached). I also changed the monitor ICC profile to sRGB.
When i export from lightroom as a Jpeg and then open in Photoshop it seems to be fine.
First, try disabling GPU in the preferences (Preformance). Any better? If not, recalibrate and build a new ICC profile, the old one might be corrupted. If you are using software/hardware for this task, be sure the software is set to build a matrix not LUT profile, Version 2 not Version 4 profile.