Hello,

This is not an issue by any means. To make the RTL work fine you need to Go to Settings >> General >> Select a language that is RTL like Arabic or any RTL language.

I have tested by applying Arabic language to the website from Settings >> General and its working absolutely fine on my end.

Screenshot for Clarification: https://ibb.co/stK56mZ

Please clear cache and check back. I hope my explanation is clear enough for you to understand the working.

Best Regards.