In font Calibri, the regular tilde ~ is placed higher than in other fonts.
That explains why it almost looks like a small tilde in the upper part of your screenshot, although it is not.
But now: why is it different in the bottom panel? It's possible that another font (with similar metrics) has been selected for that location.
Could you check in Preferences -> tab 'Layout (1)' -> section 'bottom panel' if the check box in front of 'custom font' is ticked (and what font name is displayed)?
For your information, font 'Carlito' has almost the same metrics as Calibri, but the regular tilde is placed lower.
If you don't have it on your computer, it's free and available at Google Fonts:
https://fonts.google.com/specimen/CarlitoBelow, a screenshot comparing Calibri and Carlito:
