Catalina - preview - adjust color not showing histogram

[dadders6]

I did a security update for Catalina yesterday (4-27). Today, while using preview, the 'adjust color' doesn't show a histogram - that area is blank. I relaunched finder and did a restart, no effect. The 'adjust color' is functioning, but the histogram 'screen' is blank.

 

[ProTruckDriver]

Hmm, I did the security update yesterday also and I'm seeing the same, blank.

 

[meaning-matters]

I have the exact same. I've been using this feature a lot recently, so it's pretty bad for me.

 

[IceStormNG]

Hm.. Either they fixed it already or it doesn't happen for everyone.

 

[dadders6]

I just noticed my histogram is now working...I haven't done any updating or anything.

 

[dadders6]

Now I think it's related to using Bitmaps, which I use when I'm doing various photoshop touch up. I don't have the histogram issue with .png or jpg. It might also be related to scanning photos at 600 dpi, again, for photoshop touch up.