black bubble doesn't work

s̐̈m̐̈i̐̈l̐̈e̐̈y̐̈ ̐̈a̐̈b̐̈o̐̈v̐̈e̐̈ ̐̈t̐̈e̐̈x̐̈t̐̈ ̐̈-̐̈ ̐̈j̐̈u̐̈s̐̈t̐̈ ̐̈t̐̈e̐̈s̐̈t̐̈i̐̈n̐̈g̐̈ - smiley above works

ƃuıʇsǝʇ ʇsnɾ - ʇxǝʇ uʍop ǝpısdn - upside down works

Sᴍᴀʟʟ Cᴀᴘs ᴛᴇxᴛ - ᴊᴜsᴛ ᴛᴇsᴛɪɴɢ - small caps works

Script doesn't work

Double struck doesn't work

Fraktur doesn't work

██████████ ████ █ classified works!

u͟n͟d͟e͟r͟l͟i͟n͟e͟d͟ ͟t͟e͟x͟t͟ ͟-͟ ͟j͟u͟s͟t͟ ͟t͟e͟s͟t͟i͟n͟g͟ - underline works