Weird client gap?

How can I fix this?

I'm not using FUllscreen v3 nor scale ui

i honestly dont see what the problem is here.

I would go along the lines of the other people, or:
However yeah, I noticed you want it for screenshots. Simple solutions:
1. Wait for Nilly to update the client
2. Don't take screenshots
3. Don't use hacks for uploading media

The gap is there on the regular realm website. It has honestly been there for a while. If you want to get rid if it you have to use a fullscreen client and then resize it down to suit your needs. It may cause lag but it will make your "terrible gap" disappear.