Bug Report – Black Bar Appears After Merging Layers or Saving JPG with Embedded Object

Product: Adobe Photoshop
Version: 26.6.0 (20250414.r.14 f1f3569) x64
Operating System: Window 10

When placing an embedded object on the artboard and then either merging the layers or saving the file as a JPG, Photoshop renders an unexpected black bar on the image. This happens consistently and affects final output quality.

Steps to Reproduce:

1. Open a new document.
2. Go to File > Place Embedded and insert any image.
3. Position the embedded object on the artboard.
4. Either: 
   - Merge the layers (Layer > Merge Layers), or

- Save the file as JPG (File > Save As > JPG)

Expected Result:

The image should render normally without any artifacts or additional graphical elements.

Actual Result:

A black bar appears on the image—either after merging the embedded layer or in the final JPG export.

Screenshot / Example:

Look at a History I don't put any Shape or Layer of a Black Box or anyhing
If undo on a history the black box is disappeared

But when save as a JPG. A Black box is appeared on an image