QIcon::fromTheme selects 32px icon instead of 16@2x with devicePixelRatio 2

When drawing QIcon in 16x16 rect with 2.0 devicePixelRatio, it chooses 32px icon instead of 16@2x icon despite it being present in the theme.

Both 6.8.2 and current dev (23a4b586f7137a86028e731dbaf800b1ebcf738a) are afftected.

Steps to reproduce:
1. Compile sample project from attachment
2. Run it with QT_SCALE_FACTOR=2

Expected result: green circle (16@2x icon) should shown in the window

Actual result: red circle (32 icon) is shown in the window