PQ seems to be rendered too close

[dbxxx-ac]

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• Check the bug is reproducible in the demo. If not, check KaTeX is up-to-date and installed correctly.
• Search for existing issues.

Describe the bug:
A clear and concise description of what the bug is. If your installation is available on the web or you can provide a minimal repo or CodePen that reproduces the bug, please add the link to it.

(La)TeX code:
The code of (La)TeX you tried to render:

PQ

Expected behavior:
A clear and concise description of what you expected to happen. KaTeX's general goal is to render as LaTeX does, so if possible, please include a LaTeX rendering. You can obtain one using QuickLaTeX.

$PQ$ is rendered with an appropriate spacing within LaTeX and MathJax, but in KaTeX it seems to be rendered too close.

This is how LaTeX renders PQ:

Screenshots:
If applicable, add screenshots to help explain your problem.

Environment (please complete the following information):

• Device: Desktop
• OS: Windows
• Browser: Edge