CSS bug for public profiles

[ooozerooo]

💡 Summary

The left button seems to stack on top of the user avatar when scrolling a user profile without logging in.

🥰 Expected Behavior

In previous versions, when you scroll on user profiles the left button would disappear and elements wont stack.

https://user-images.githubusercontent.com/106132975/221421812-bb798393-7ea1-4768-a483-fb0d4fc150f1.mov

🤬 Actual Behavior

In the latest version, the left button appears on top of user avatar and is cropping the avatar.

https://user-images.githubusercontent.com/106132975/221421740-36997714-2082-4c94-8612-15dad22e18bf.mov

📝 Steps to Reproduce

1. Open a misskey profile without logging in
2. scroll on user profile

📌 Environment

Misskey version: v13.7.5 Your OS: macOS Your browser: Fifefox, Chrome