Slow menu open transition with popular library

Description of the issue:
The mmenu.js library has a slow/jerky transition when opened.

How can this issue be reproduced?
Visit the mmenu.js website and click on the menu icon.
The menu will pop open instead of sliding.

Expected result:
Smooth open animation.

Brave Version( check About Brave):

Mobile Device details
iPhone 13 mini

Additional Information:

It may be caused by use of translate3d?

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