Qt 6.4 is not respecting my background colours on vertical header items
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Code using Qt 6.3.1 works correctly. No change to code and appears only the first setBackground vertical header respects the colour. The setForeground colours are correct and a tooltip for the object is also correct in 6.3.1 and 6.4.0.   
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Please provide a minimal, compilable example of your problem.
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I've created a small example as requested. Not sure how to input on Qt Forum so have uploaded a package to GitHub. https://github.com/bennyPerth/verticalHeaderProblem
Think I've uploaded all the necessary files and there is also an image with the results am getting when changing my project from 6.3.1 to 6.4.0
Have made a few changes to the source to highlight the setting of the foreground colour is always correct.
The example displays 7 rows. There is a variable called maxRows that can be changed from 2 to 7 and the first and last row colour is always correct and the middle ones are wrong. If one then does a mouse down on a middle cell and hold it, the background colour is the correct one. If one then presses and holds another middle cell it has the same background colour as the first one pressed. Weird!
No responce after three weeks so have altered my app to replace the vertical headers with push buttons. So my problem is effectively resolved.
BTW the horizontal headers also have the same problem. Hadn't noticed because I only varied the foreground colour in them.
Am changing from watching to ignoring.
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code works again when using Qt 6.4.1
