Katex rendering in Nextcloud 20.0.2 seems buggy

Thanks for the great app, extremely useful!

However, I'm experiencing issues with Katex-rendering, for example

sub and superindices are off
spacings do not work
...

see https://cloud.octaplex.net/index.php/s/ezfLAg57djNw45P .

The Webconsole shows warnings like:

$ is deprecated: The global jQuery is deprecated. It will be updated to v3.x in Nextcloud 21. In later versions of Nextcloud it might be removed completely. Please ship your own.

and

jQuery is deprecated: The global jQuery is deprecated. It will be updated to v3.x in Nextcloud 21. In later versions of Nextcloud it might be removed completely. Please ship your own.

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