Why does my snipping tool no longer bring up the pop up image to edit?

Correct, this is the actual fix we're all looking for. Fixed it today after a year of the issue.

Open snipping tool, go to settings, turn OFF “Auto Save screenshots”

I figured out the problem, at least for my machine. The settings in the app have "Automatically save screenshots" on by default. This saves the screenshots to a folder on your computer. When I turned that off, the screenshots started popping up in the notification menu again!

Yes! Finally! This is the simple answer that actually works. Thank you, thank you, thank you!

Without doubt the Snipping Tool in Windows 11 is buggy. I have "Automatically save screenshots" to OFF and for Windows Settings > Apps > Default Apps "Screen Snipping", the default 'file types or link types' is set to "Screen Snipping" (NOT "Snipping Tool"). With these settings, a right-click on "Snipping Tool" (either the taskbar shortcut or under "All apps") and "Take a new screenshot", always presents me with the editing window albeit the position is very annoyingly somewhat random - this is the only Windows application in my memory that breaks the rule that says 'remember the size and position of any given window for next time'.

As for Windows key-Shift-S, this always gives me a notification "Snip copied to clipboard" but has never automatically invoked the editing window requiring instead a click on the notification itself. To begin with I found this frustrating but I've come round to thinking that I actually like this behaviour. Combined with the Windows 'Clipboard History' feature, I can quickly take a few screenshots one after the other (to, say, illustrate a little workflow) and then paste them somewhere else later on.

I also have, by the way, "Multiple Windows" set to ON. When invoked with the right-click, this enables multiple editing windows, one for each screenshot, which is sometimes handy.

For anyone still experiencing this, I appear to have resolved it (for now at least, I haven't rebooted yet). Open the Snipping Tool from the Windows screen icon (i.e. not Windows key-Shift-S). Then click on the 3 dots at top right (when you mouse over, it says See More). Click on Settings. In my list the second option Automatically save screenshots was set to ON. Change the setting to OFF. Now when I use the Windows key-Shift-S, the screen grab remains on screen and allows me to edit it.

Incredibly, the opposite has fixed it for me. I had turned off autosave, and now that I turn it back on, I get notifications again.

Background: I've tried the default apps fix, the reset/restore, the reinstall, etc. All other things in this thread. Nothing helped.

Turning on autosave fixed it.

I tried turning off autosave again, and I again stopped getting notifications. Turning autosave on and off reliably fixes and breaks the notification functionality.

I guess I'll have to manually clear out these useless files every once and a while, but at least my snipping tool is functioning again.

I hope this post helps others with this incredibly annoying bug.