This bug is highly dependent on font name and size. Most fonts seem to have sizes that work and sizes that don't work. I've tested various sizes of some popular coding fonts and summarized the results in the table below.
This info assumes that you haven't used CTRL+Mouse wheel to zoom your Editor to something other than the default of 100%. The info below is only accurate at 100% zoom.
Courier New | Consolas | Fira Code | JetBrains Mono | Cascadia Code | Source Code Pro | |
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5 | ||||||
6 | ||||||
7 | ||||||
8 | ||||||
9 | ||||||
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11 | ||||||
12 | ||||||
14 | ||||||
16 | ||||||
18 | ||||||
20 |
You can change your Editor's font in Options|Editor|Font and Styling. On the right hand side, select the "Default" styling and change the font there.
Script output font is in Options|Scripts.
DBMS output font is in Options|Oracle|General.