How to "turn off" the event's 'first to...' pop-ups if you don't log out

Apparently there's a way to "disable" pop-ups that annoy a lot of people at the beginning of the league, but it's... quite specific.

I noticed that when I have the chat open with 4 or more* orange messages, and the 5th appears, I often can scroll up in the orange message section of the chat. When it's scrolled so the last message is not visible ('not last'), the orange 'X is the firxt character to do Y' messages stop appearing.

Unfortunately, they come back if you relog or scroll down to the last orange message, but it's still less visual clutter.

*4 or more in my chat size settings. Also it doesn't work every time, sometimes it auto-scrolls to the last orange message.

Yaa super annoying

X is first person to reach level 11
X is first person to reach level 12
and so on.

Ill wait a few hours to come back to endless delve. I get it im slow but you dnt gotta throw it in my face lol.

In a race, it makes sense.
In a new league, it does not.