Windows 10 resets taskbar height to single row after restart

I set my taskbar to auto-hide and a height of two rows of icons/buttons. But each time I restart the PC the height is reset to one row. (Auto-hide is preserved.)
On another computer running the same Windows build (10.0.15063) the two row height is preserved between restarts.

Is there a fix for this, registry or otherwise? I already checked "Taskbar settings", but to no avail.