In a single value element, the text size always adjusted dynamically to the element's height. E.g., if you use the mouse to increase the single element's height, the text becomes larger.
However, once you add the tag version="1.1" to the topmost dashboard or form element, the text size is fixed and does not adjust to changing heights any more.
A screen recording is available here: https://www.youtube.com/watch?v=M_btqoyDg2I
My test environment: