Issue with the playback of 64th note tremolo octaves.

For the piece I'm presently working on, I have found myself in need of hemidemisemiquaver (64th note) tremolo octaves.

I have searched the handbook and forums for solutions but with no luck.

When I listen to the playback, it is only playing demisemiquavers (32nd notes). I can write them out manually, and they work, but that takes up a lot of room. This may not be relevant, but I have also noticed that trills are limited to demisemiquavers.

The piece is slow, lento, 53 bpm.

Here are my specs and the version I am working on:
OS: macOS 14.5, Arch.: arm64, MuseScore Studio version (64-bit): 4.5.0-250721848, revision: 7c55023

Below is linked the score in question. Bar 33 holds the notes at issue. If that bar is played by the playback, the difference in tempo becomes evident.

Invention No.1.mscz