That's,,, weird. The only instance I have of this happening is from people using old saves. However, L's character definitely shouldn't be showing up with they/them pronouns at all since it isn't part of L's code. If there's a way you could screenshot or copy and paste the section, I'll look into it.
2 years ago(+1)(-1)
The first one is an example of the missing dialogue bit. The second is an example of the pronoun issue, but I know there's more. This was just the first one I saw.