Hello. For some players, the text in the note is not displayed.

Post here your config file please

{
  "Command || Note Text": {
    "umod": "",
    "discord": "",
    "promo": "Чтобы скопировать, отметьте текст мышью и нажмите Ctrl + C на клавиатуре:\n\nПромо-код в магазин:  BLADE\n\nМагазин:\npeakyblinders.gamestores.ru/#/app/store/"
  },
  "Command usage cooldown in seconds (0 = Disabled)": 6,
  "Message SteamID icon": 0
}

Do these players see only the non cyrillic letters or its just blank for them ?

What happens is that most players can see this note text (screen-1), but some do not see the text in the note (screen-2).
Screen-1:

Screen-2: