In a mockup, when I click the Edit smart object layer to add an image to a smart object and I press save, it doesn’t show my logo on the PSD tab with the smart object. What is going on?
Possible/related issue: Your smart object file is unlinked from main file, for example by doing Undo in your main PSD file.
Suppose you've a file
a.psd and your logo is a circle shape with red color. You convert it into smart object and save
a.psd file. A few seconds later, you want to change color to blue, so you double click smart object layer and it opens the logo shape layer in a new tab. Photoshop gives this file a temporary name e.g.
Ellipse 1.psb. You save it and go back to
a.psd and notice that color is changed as expected, but you Undo the change and save
a.psd again. But a few seconds later you realize you need blue really. So you go back to
Ellipse 1.psb and save it again but it doesn't affect the color in
a.psd as it unlinks it.
You need to double click again the smart object layer in