Arch Linux

Description:
since plasma 5.5.1-1 packages I notice a bug :

- sometimes the left mouse click is not detected when I click on the plasma taskbar ( kickoff, K menu ), for example if firefox is minimized on the taskbar then sometimes a mouse click for restoring the firefox window doesn't work, I have to do this mouse click twice in order to restore the window,

this bug doesn't occur with plasma 5.5.0,

I can reproduce this bug on my PC ( archlinux 64 bits ) and on a qemu virtual machine i686,

this bug occurs randomly ( you have to test at least 10 times in order to trigger the bug, for example 3 windows opened or minimized, then try to click on the taskbar in order to minimize/restore on of these 3 windows, you will notice that sometimes the mouse click is not detected by plasma 5.5.1 )


Additional info:
* package version(s) plasma 5.5.1-1 packages
* config and/or log files etc.


Steps to reproduce:
- update to plasma 5.5.1-1 packages
- sometimes when you want to minimize or restore a window ( firefox, thunderbird, dolphin for example ) the plasma taskbar doesn't detect the left mouse click
- this bug doesn't occur with the previous versions of plasma ( for example 5.5.0 )