Space " " in unicodeCoverage list not processed properly

If using the following:

Qt.font(

{ pixelSize: 22, unicodeCoverage: [[0x30, 0x39], [0x41, 0x5A], [0x61, 0x7A], " "] }

)

The font is expected to include characters 0-9, A-Z, a-z, and the space character.

But it appears that the space character is not rendered correctly with static font engine (glyph is missing).

There are a few workarounds:
1. Add an additional character after the space character to the unicodeCoverage list, e.g. "!"
2. Instead of using " ", give a range [0x20, 0x20]

Please find the example which reproduces the issue attached.