Created attachment 186101 [details]
Screenshot of blurry task manager that should be completely clear and was in 6.4.5

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SUMMARY
Fully transparent task manager no longer fully transparent after upgrading from Plasma 6.4.5 to 6.5.  

STEPS TO REPRODUCE
1.  In plasma 6.4.5, I had Plasma theme Maia Transparent, with Desktop Effects Blur set to 0, and my taskbar was completely transparent; I only saw icons which is what I wanted.
2. After upgrading to 6.5, now the taskbar looks terrible and is visible. 
3. I can switch to Breeze or other themes but none allow me to make the taskbar 100% transparent again unless I am missing the new way to do this in 6.5.

OBSERVED RESULT
Blurry task manager bar

EXPECTED RESULT
100% clear task manager bar

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
(available in the Info Center app, or by running `kinfo` in a terminal window)
Linux/KDE Plasma: 
KDE Plasma Version:  6.5.0
KDE Frameworks Version:   6.19.0
Qt Version: 6.10

ADDITIONAL INFORMATION