Are you sure your mouse isn't broken and sending double-clicks? Maybe you can test on some files in Dolphin? I had this happen before once and it was a hardware problem.

Yes, I am sure my mouse isn't broken.

I also had this happen with only firefox open and when I click on any plasmoid in tray, popup immediately closed.
But when I click on tray arrow and only then on plasmoid, then popup doesn't close.

Not sure if it's Qt, Plasma or Kernel update but I don't have focus loss issues anymore.
And apparently other issues I had (e.g. some windows didn't close when I click on their tray icon) also don't reproduce anymore.

Attaching current versions for the reference, if anyone else have this issue or it will happen in the future again.

SOFTWARE/OS VERSIONS
Operating System: Arch Linux 
KDE Plasma Version: 6.0.3
KDE Frameworks Version: 6.0.0
Qt Version: 6.7.0
Kernel Version: 6.6.26-1-lts (64-bit)
Graphics Platform: X11

No, it wasn't fixed and I think I found a reproduction:
1. Switch to non-default keyboard layout
2. Click on any plasmoid in tray that opens popup (wireless, audio, etc) but not arrow down

I think you need to have keyboard layout switcher (not sure, maybe just having multiple layouts will work)

Confirm

Arch, 6.8.5-arch1-1
plasmashell 6.0.3
Wayland

Created attachment 168588 [details]
reproduction

I confirm the same is happening for me. If non-english keyboard layout is selected then I can not open any popup from any tray icon - it's just closed right away.

Operating System: Fedora Linux 40
KDE Plasma Version: 6.0.4
KDE Frameworks Version: 6.1.0
Qt Version: 6.7.0
Kernel Version: 6.8.7-300.fc40.x86_64 (64-bit)
Graphics Platform: Wayland

Max, that sounds like s different issue, most likely Bug 485456.

guvindr+kde and Dmitry, thanks for the screen recording, but when I do the same thing, I don't see that issue. When I switch to the Russian keyboard layout and click on other system tray icons, everything works as expected.

Is the issue happening for either of you in a new clean user account? Can you check?

(In reply to Nate Graham from comment #8)
> Max, that sounds like s different issue, most likely Bug 485456.
> 
> guvindr+kde and Dmitry, thanks for the screen recording, but when I do the
> same thing, I don't see that issue. When I switch to the Russian keyboard
> layout and click on other system tray icons, everything works as expected.
> 
> Is the issue happening for either of you in a new clean user account? Can
> you check?

1. Settings → Keyboard → Layouts → Switching policy
2. Set to "Window"
3. Also enabled "Configure layouts" and added English (US) and Russian
4. Also Main shortcuts is CapsLock and 3d level is RAlt

Created attachment 168927 [details]
Keyboard1

Screenshot 1. These settings are create the problem

(In reply to dmitry.myachin from comment #10)
> Created attachment 168927 [details]
> Keyboard1
> 
> Screenshot 1. These settings are create the problem

Also enabled extra typographic characters and Kill X.

I set same settings in a new profile and got the problem again. It's the policy, I guess

I can partially confirm that it seems to be somehow connected to policy, but for me it's inconsistent. Sometimes after I switch policy (to application or window) tray popups start to work properly on any layout but other time this bug manifests. Maybe something happens during switching/initialization of a policy?

I'm on Qt 6.7 now, and I've replicated those settings exactly, but still can't reproduce the issue. :(

I have per-application (not per window) layout and I didn't have an issue when I boot previously.
But I had it when I started PC for the last session and I have en layout as default.

So, after that I:
1. Closed all windows
2. Focused on desktop
3. Switched layout to secondary
4. Opened different app

In this case I had no issue no matter what keyboard layout is active in opened app (either en or secondary).

Then I:
1. Closed all windows
2. Focused on desktop
3. Switched layout to en
4. Opened an app

And I can reproduce an issue again:
If I switch layout to secondary while I'm in the app, popup windows start to erratically close.
If I switch it back to en, it works alright.

I used Firefox for all of my experiments but I don't think it matters because I have seen it with other apps as well

I just noticed something: when this problem happens (i.e. I click on a tray icon and popup disappears), keyboard layout tray icon also plays animation like it was also clicked though it was not, layout is not changed though.

Created attachment 169080 [details]
Bug example

Same problem. Incredibly annoying bug. Stably observed when switching policy “window” or “application”.

Fedora 40, Kernel 6.8.7, KDE Plasma 6.0.4, KDE Frameworks: 6.1.0, Wayland

I see why I couldn't reproduce it before: it only seems to happen with a panel on the bottom or right screen edge. I normally use a left screen edge panel.

Can reproduce the issue 100% with a bottom or right screen edge panel.

*** Bug 486661 has been marked as a duplicate of this bug. ***

I found one workaround to escape the Plasma reloading in order to kick away the bug:
1. Open the tray options dialog.
2. Change the icons size and apply.
3. Change it back and press OK.

(In reply to Nate Graham from comment #17)
> I see why I couldn't reproduce it before: it only seems to happen with a
> panel on the bottom or right screen edge. I normally use a left screen edge
> panel.
> 
> Can reproduce the issue 100% with a bottom or right screen edge panel.

I use left and top panels, tray and indicator located at the top one.

(In reply to Serge Roussak from comment #19)
> I found one workaround to escape the Plasma reloading in order to kick away
> the bug:
> 1. Open the tray options dialog.
> 2. Change the icons size and apply.
> 3. Change it back and press OK.

For the second time this workaround didn't help... :(