No histogram with curves channel

[CogPsyence]

I'm trying to add a curves layer to my photo and I don't see the histogram in the channel dialog box. Is this a bug. I'm using a Mac with Ventura 13.2.1 if this matters. I've attached a screenshot if it helps

[Old Bruce]

It looks like you are adjusting for an empty/blank/clear Pixel layer.

[walt.farrell]

You have something strange showing in your Layers panel that I cannot recreate.

My Curves adjustments look like this:

You seem to have a Pixel layer nested in your Curves adjustment, except that when I try that, I get a nesting indicator in the first position and the Pixel layer shows as a mask:

 

[walt.farrell]

1 minute ago, Old Bruce said:

It looks like you are adjusting for an empty/blank/clear Pixel layer.

I don't think so, as that would show like this:

Note the nesting indicator in the first position, and that the pixel icon is first, then the curves icon. And the label shows Pixel not Curves.

[h_d]

I don't have an answer, just some observations.

When you create a new Adjustment Layer you get this:

If you then invert it, you get this:

 

If you invert the Adjustment Layer a second time, you get this:

This arrangement is only temporary, though - as soon as you make any change to settings in the Layers panel (eg Opacity or Blend Mode), the white thumbnail disappears and the Adjustment Layer reverts to its original state. 

What @CogPsyence has seems similar to my third screen grab (no nesting indicator, the Adjustment icon to the left of the Layer thumbnail), but with an apparently permanent, transparent  thumbnail. I don't think there's an additional pixel layer, just a mask.

Which doesn't make a lot of sense, as an adjustment mask should range between white and black. I've tried quite a few ways of making the thumbnail/adjustment layer transparent, without any success.

It may well be a bug, but I'm not sure if it's readily repeatable. Perhaps the easiest solution for @CogPsyence would be to delete the original adjustment layer and try again. (Or alternatively upload the .afphoto file to the Forum so others can investigate more fully.)

 

[walt.farrell]

6 minutes ago, h_d said:

What @CogPsyence has seems similar to my third screen grab (no nesting indicator, the Adjustment icon to the left of the Layer thumbnail), but with an apparently permanent, transparent  thumbnail. I don't think there's an additional pixel layer, just a mask.

Thank you. I think you're right. And I have no idea how that was created.