Nicknames longer than 16 characters get cut off in replay data
If your nickname exceeds 16 characters, the game will cut it down past that character in any saved Record Attack ghosts or saved Race/Battle replays in Kart. This can potentially prove problematic in edge cases involving multiple people sharing the first 16 characters of a name, though in general it's just a bit annoying for someone like me (with a nickname that's 17 characters long). What's also of note, is how the skin name is saved immediately after, so there's literally no more space for it to save the rest of the nickname. Since replay sizes are already variable, it should be possible to increase this limit by a fair amount, right? This would obviously break compatibility with any older replays, though.
This issue occurs both in vanilla and Kart, but is much more noticeable in the latter.
Note: The gif below is from the uncapped build released on the Message Board, however the issue does exist in vanilla as well.
Now, this isn't just an innocent display bug, the full name flat out isn't saved to the replay.
Vanilla example:
Kart example:
Sorry if this's a duplicate, but I've spent a good 10-15 minutes looking for anyone who has already reported this (since it's so old I'm suprised no one did so) and I couldn't find anything.