This has been occurring frequently in Photoshop CC 2021, before and after the latest update. When I am finished editing an image, which generally have multiple layers, save it and then close the image, after the image closes, the attached screenshot remains in the image frame for a few seconds to as much as 30 seconds before it goes away on its own. Has anyone else seen this happen?
That is almost certainly video card related. Open Preferences to the Performance tab (Ctrl K or Cmd K)
If Use Graphics Processor is checked, uncheck it, restart Photoshop, and see if that has fixed it. If it does then go back to the Performance tab, click on Advanced settings and try different options.
The bottom line here is that there is an issue with your video card driver, so make sure the driver is fully up to date, and do this at the card maker's website. If you are at all unsure, let us know what operating system version you are using, and tell us a bit about your hardware.
It would help if you opened Photoshop and went Help > System Info > Copy and pasted to this thread (there is a fair bit of it, but don't worry.
EDIT: deleted reply, the problem wasn't what I thought it was, which I discovered when I finally downloaded the attachment.
Not your fault, countrygirl, but these blasted attachments are a pain. You can insert screenshots directly into the thread without attaching it, making life simpler for everyone, but you'd be forgiven for not seeing this well-hidden fact. Instead, "attach file" jumps in your face.