Can tabbing in and out during loading screen be actually possible?

it has always been possible lol.

i do it every game

It was always possible to do it

how is it NOT?

Sounds like a personal problem, I've had no problem with alt tabbing on loading.

I do it all the time, I think the problem is more windows than anything else

step 1. wait for the champion images to show up

step 2. alt tab, but might not work if you don't have anything else open. If you don't then hold alt tab and click on a desktop application or something

If this doesn't work try "windows key + D" to force it to show your desktop.

If youre on mac I don't know if you have that or not but fuck mac lol