What are your CaitVi fanfiction pet peeves?

I known this is really subjective but I'm curious to know what you guys dislike about certain stories you've read. This is mostly to gain some perspective and improve my WIPs.

This post is not meant to offend anyone. Please, try not to name any writers and let's not shame anyone.

This might not be too common, but mine is when Vi is written as if she didn't know anything about common things in Piltover, or in general. I know there's a ton of cultural differences between both cities, but I feel like Vi would know more than a few things about the Piltovan society, considering she was a con as a teen and would steal from the wealthy.