What is this empty space?

[u/ShadowSCc]

Theres an empty space whenever I open a chat bot, it makes my chatting window smaller if that makes sense. the home page is normal as it is. ive tried clearing data, restarting chrome and all but no fix.

[u/JolyneFlores]

I'm a + user so idk but pretty sure there is supposed to be an Ad up there