Weird horizontal line across bottom of screen

I recently installed a Manjaro XFCE partition on my work laptop:

OS: Manjaro Linux x86_64
Host: HP ProBook 450 G3
Kernel 5.8.6-1-MANJARO
DE: Xfce 4.14
WM: Xfwm4
CPU: Intel i5-6200U (4) @ 2.800GHz
GPU: Intel Skylake GT2 [HD Graphics 520]

There is a weird line running across the bottom third of my screen which looks like some kind of invisible panel. However, it is not always there. For example, in Impress if I put it in presentation mode the line disappears. Is this some kind of accidental thing that I enabled? I tried to include a screen shot but apparently this is not possible. Any pointers in the right direction to remove this would be greatly appreciated.

Thank you!!

Welcome at the Manjaro forum, @tlmooreclemson

You should update your system, first:

sudo pacman-mirrors -f && sudo pacman -Syyu

Then reboot and afterwards post output of

inxi -Gxxxza
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Do you use something like Plank or a similar Dock? And is the shadow option for docks enabled in window manager tweaks -> compositor?

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Thank you so much! It was the shadow option underneath Window Manager Tweaks -> Compositor. I didn’t notice this error appeared when I installed Plank. I just eventually thought I was seeing things.

Sorry for the late reply! Xabbu pointed out the issue below but thank you for your time.

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