Left Mouse click slightly slower

Because I wanted to switch to BTRFS for all my systems I re-installed my laptop, I create an ISO with build-tools (KDE Full, Kernel5.4) and fired that up. System is working fine besides a few issues/question.

After installation it appears my left mouse click is a bit " delayed" if I hover over e.g. a application in the Task Manager. I have to click it in exactly the right timing else it is not registered. This is true for all left clicks (opening a link, clicking a tab in a browser etc.) Because my laptop worked fine before re installation it is hard to getting used to the current " click speed" (and because of that annoying).

I googled a bit and found some mention of:
Is there something I can do

  • Emulate3Buttons (but that is not enabled)
  • Touchpad (that I disabled, by renaming to:
    /etc/X11/xorg.conf.d/30-touchpad.NOT

Because I have to click " just right" , double click is extra difficult (which I noticed a few times while writing this post and double clicking a word to select it.)

Some information from x11:

xinput list                                                                                                                                                                                                                 ⎡ Virtual core pointer                          id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎜   ↳ Microsoft Microsoft® 2.4GHz Transceiver v8.0 Consumer Control     id=12   [slave  pointer  (2)]
⎜   ↳ Microsoft Microsoft® 2.4GHz Transceiver v8.0 Mouse        id=13   [slave  pointer  (2)]
⎜   ↳ Microsoft Microsoft® 2.4GHz Transceiver v8.0 Consumer Control     id=14   [slave  pointer  (2)]
⎜   ↳ ETPS/2 Elantech Touchpad                  id=19   [slave  pointer  (2)]
⎣ Virtual core keyboard                         id=3    [master keyboard (2)]
    ↳ Virtual core XTEST keyboard               id=5    [slave  keyboard (3)]
    ↳ Power Button                              id=6    [slave  keyboard (3)]
    ↳ Asus Wireless Radio Control               id=7    [slave  keyboard (3)]
    ↳ Video Bus                                 id=8    [slave  keyboard (3)]
    ↳ Video Bus                                 id=9    [slave  keyboard (3)]
    ↳ Sleep Button                              id=10   [slave  keyboard (3)]
    ↳ Microsoft Microsoft® 2.4GHz Transceiver v8.0      id=11   [slave  keyboard (3)]
    ↳ Microsoft Microsoft® 2.4GHz Transceiver v8.0 System Control       id=15   [slave  keyboard (3)]
    ↳ USB2.0 UVC HD Webcam: USB2.0 UV           id=16   [slave  keyboard (3)]
    ↳ Asus WMI hotkeys                          id=17   [slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard              id=18   [slave  keyboard (3)]
    ↳ Microsoft Microsoft® 2.4GHz Transceiver v8.0 Consumer Control     id=20   [slave  keyboard (3)]
    ↳ Microsoft Microsoft® 2.4GHz Transceiver v8.0 Consumer Control     id=21   [slave  keyboard (3)]

xinput list-props 13                                                                                                                                                                                                        
Device 'Microsoft Microsoft® 2.4GHz Transceiver v8.0 Mouse':
        Device Enabled (196):   1
        Coordinate Transformation Matrix (198): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
        libinput Natural Scrolling Enabled (332):       0
        libinput Natural Scrolling Enabled Default (333):       0
        libinput Scroll Methods Available (336):        0, 0, 1
        libinput Scroll Method Enabled (337):   0, 0, 0
        libinput Scroll Method Enabled Default (338):   0, 0, 0
        libinput Button Scrolling Button (339): 2
        libinput Button Scrolling Button Default (340): 2
        libinput Button Scrolling Button Lock Enabled (341):    0
        libinput Button Scrolling Button Lock Enabled Default (342):    0
        libinput Middle Emulation Enabled (343):        0
        libinput Middle Emulation Enabled Default (344):        0
        libinput Accel Speed (345):     0.000000
        libinput Accel Speed Default (346):     0.000000
        libinput Accel Profiles Available (347):        1, 1
        libinput Accel Profile Enabled (348):   1, 0
        libinput Accel Profile Enabled Default (349):   1, 0
        libinput Left Handed Enabled (350):     0
        libinput Left Handed Enabled Default (351):     0
        libinput Send Events Modes Available (317):     1, 0
        libinput Send Events Mode Enabled (318):        0, 0
        libinput Send Events Mode Enabled Default (319):        0, 0
        Device Node (320):      "/dev/input/event5"
        Device Product ID (321):        1118, 1970
        libinput Drag Lock Buttons (334):       <no items>
        libinput Horizontal Scroll Enabled (335):       1
        libinput Scrolling Pixel Distance (352):        15
        libinput Scrolling Pixel Distance Default (353):        15

What changed, that can cause this?
How can I fix it?