Superscript/subscript font size ratio it not maintained after font size change.

Steps to reproduce:

• open Inkscape
• create a blannk new document.
• click on the text tool
• pick a font size, like 10.
• write something, like "X2".
• set a part of the written text as superscript/subscript, like the "2".
• (optional) make a copy of the text to better compare after.
• deselect all
• click on the text tool
• click on the written text
• change the font size to another value, like 11.

What happened?

The size of the charaters set as superscript/subscript is not longer smaller than the size of the main font. ...

What should have happened?

The superscript/subscript characters should remain the ratio size to the main text font. ...

Inkscape Version and Operating System:

• Inkscape Version: Inkscape 0.92.4 (5da689c313) / 1.0 (4035a4fb49)
• Operating System: Windows 10 / Windows 7 Ultimate.
• Operating System version: 10.0.18363 / 6.1.7601.