I'm using PS 20.1.0 on MAC OS Catalina 10.15.3. Working on black and white illustrations in greyscale mode for a book, Photoshop crashes every time I use the eyedropper tool to sample a color value of the file that's not in focus. Sampling with the eyedropper tool from whichever file is in focus does not cause a crash.
I usually have two or more files open while working to sample colors, and have never had this problem in earlier versions no matter what color mode: greyscale, RGB, or CMYK.
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