cannot click desktop icons when 'delete confirmation dialog' was covered by starting application

[Fi Stach]

Issue:
Desktop is not responding to any clicks, I cannot click any icon with either left or right mouse button.
Furthermore I cannot log out using the upper menu, after clicking 'logout' nothing happens.
If I lock the screen and unlock, the issue still persists.
Toolbars work, so I can reboot the system, use the ubuntu launcher and the icons on the toolbar.

Steps to reproduce:
1. Click an icon to start any long-starting application (in my case it was vscode).
2. Click on an item on the desktop, press SHIFT+DEL. The confirmation dialog appears 'are you sure you want to delete...?'
3. The long-starting application pops up, covering the whole screen.
4. Minimize the application window.

Afterwards the confirmation dialog is not reachable, it's not visible any more, and desktop is unresponsive.

Expected:
The confirmation dialog should be visible when I minimize the application.

My system:
Description: Ubuntu 16.04.3 LTS
Release: 16.04

System is up-to-date.

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1736374/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

[Paul White (paulw2u)]

We are sorry that we do not always have the capacity to review all reported bugs in a timely manner. You reported this bug some time ago and there have been many changes in Ubuntu since that time.

Ubuntu 16.04 (xenial) reached end-of-life on April 29, 2021.

Do you still see a problem related to the one that you reported when using a currently supported version of Ubuntu? Please let us know if you do otherwise this report can be left to expire in approximately 60 days time.

Thank you for helping make Ubuntu better.

[Launchpad Janitor (janitor)]

[Expired for Ubuntu because there has been no activity for 60 days.]