Lets say you have some `QTableView` with a default section resize mode set to stretch. Now you want a specific column to have a fixed width. Example code like this:

horizontalHeader()->setSectionResizeMode(QHeaderView::Stretch);
horizontalHeader()->setSectionResizeMode(3, QHeaderView::Fixed);
horizontalHeader()->resizeSection(3, 20); 

In Qt 6.6.0 this works exactly as expected with all columns stretched and column 3 having a fixed width. All versions starting from Qt 6.6.1 however have column 3 stretched aswell, ignoring the fixed width.

I think the exact commit introducing this bug is https://github.com/qt/qtbase/commit/4253b2b6e70ce6f2a2b5b18d9a5a230e1aa01b5e