They do allow some unicode chars like: ⏩⏪⏫⏬ and ⏰, I guess they are validating up to some unicode code point. Because most emoji are not shown. I believe this c

They do allow some unicode chars like: ⏩⏪⏫⏬ and ⏰, I guess they are validating up to some unicode code point. Because most emoji are not shown. I believe this chap: ◿, the lower right triangle, U+25FF, is the last one allowed.