Hi! I am having a problem where a 1px line mirroring the desktop wallpaper color shows on the left side of the Taskbar. Temporarily changing the display scale from 100% to 150% and back fixes the issue briefly before it reappears. While disabling the global blur effect in Desktop Effects resolves it entirely, this also removes blur across the entire system and I quite like it 
I wish I had the problem of having great eye sight
ive seen that 1px strip when blur and panel opacity fight scaling.
id try:
-Colors & Themes > Colors, nudge Panel Opacity a bit either way
-open Panel settings, set thickness to 44 or 48
-if Display is stuck on 125%, park it on 100% or 150% for a bit
disabling blur fixing it forever matches what happened on my box, so those are the softer knobs.