P: 21.1.3 - Hue Saturation dialog not responsive

Guys this is insane! I work with fabric prints and it's being impossible to develop new artworks for my clients without color changes and rulers.

Hi - I am using PS version 21.1.3 on Mac OSCatalina 10.15.4.

When using the 'Replace Colour' function, upon selecting the colour with the eyedropper -  PS freezes up and I am forced to restart the program. I have tried restarting the program, and the Mac with no success.

Once I hide the rulers, the problem is rectified.

I'm also having problems with other sliders

I would have NEVER thought of this, but I tried it and it works.  Thanks for sharing.

Turning rulers off as suggested seems to have fixed this.

Disabling rules worked for me, at least it's a temporary fix.

I found a bug in the latest Version of Photoshop. When using: image >  correction > color/saturation photoshop freezes. I was able to change the saturation one time. But after changing the values again (fine tuning), the window freezes. I am not able to close the color/saturation window. I have to shut down PS from the system.
I ́m using an iMac with the Catalina 10.15.3 

My business depends on PS daily, so constant freezes on BRIGHTNESS or SATURATION, etc. and forced quits cause major disruptions and time lost.  I'm going nuts!  I tried getting rid of the ruler and IT WORKED!  I don't know if this is temporary, but at least I got some relief.  Thanks to all for this help

Exactly.  It happens with multiple dialogs that I have tried.  Total freeze when more than one slider is moved.  And on a single slider movement...it is painfully stuttery.  Unbelievable that such basic functionality could get broken in such a late release update.

Please try and find a Bug Report on the Hand Tool-issue or start a new one. 
One issue per thread should make it easier for Adobe-personnel to evaluate the relative impact of the issues.