Secondary subtitle font always too small [Sort of Solved]

[Clowdy Howdy]

[I have found a workaround by installing the browser extension into a different browser. Brave browser doesn't have the same issue for some reason.]

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[Windows, Whale browser]

I have tried changing all the settings for secondary subtitles in multiple language profiles and the result is always the same. The secondary subtitles do not inherit the settings that I chose for them.

They appear too small, the wrong color, without the stroke, and not blurred, making them unusable.

For reference, here are my selected settings for Primary subtitle

and here they are for the secondary subtitle:

Note, the korean font has support for roman characters, so it should work, but the result is also the same if I choose english as the secondary subtitle font.