Unicode support in Feeds

Looks like channel feeds doesn’t support unicode. I have Cyrillic characters in my channel description, video titles and descriptions. Any options here to add unicode support? Thank you!

XML (MRSS) and JSON both support Unicode. What seems to be your problem? Please include your feed.

Baradanikto:XML (MRSS) and JSON both support Unicode. What seems to be your problem? Please include your feed.
Here it is. Properly encoded unicode characters (Cyrillic) looks good on site preview:

[upload|xWuA6IV/zRxyfwcjUOXuWQ==]

But on real device all of these characters looks like crossed squares (broken characters)
Every Google Font for example can support Cyrillic characters, why on Roku its a problem?

Try “rus” for your language code.