Brave + youtube - dark mode and settings

*Description of the issue:
I’ve been browsing brave community forums and I’ve found some users experiencing the same as I. Once in a while youtube stop using the dark theme and became white without me thanking any action. The normal procedure is going to setting and put it back, but it’s impossible. Please take a look at this screen recording https://1drv.ms/v/s!ApIqH18Qtou1jDbEjc1mo-Wz0BXh?e=GXEMIG

My specs:
Brave is up to date
Version 1.10.90 Chromium: 83.0.4103.97 (Official Build) (64-bit)

Additional Information:
macOS Catalina 10.5.5
MacBook Air (Retina, 13-inch, 2020)