Last 7 characters in LCD display not shown

[jcelerier]

I'm sending a buffer with 112 x, except '\n' at positions 55 and 111: yet I am not seeing them in the last few characters

Here's my code in case it's something stupid:

  static auto update_lcd(std::string_view txt)
  {
    uint8_t buf[112] = {};
    for (int i = 0; i < std::min(int(std::ssize(txt)), 112); i++)
      buf[i] = charmap_lcd(txt[i]);
    buf[55] = '\n';
    buf[111] = '\n';
    
   // buf is then sent according to protocol
   ...
  }