QSyntaxtHighlighter::rehighlight() does not update TextEdit

After calling QSyntaxtHighlighter::rehighlight() to update highlighting on the whole document nothing happens until the text edit is updated (for example: resized..).

Expected behavior: text background should be updated after calling rehighlight()

The workaround for this issue is to update every block with QSyntaxHighlighter::rehighlightBlock(textblock) mentioned here.