@Koochi-Q Yesterday I learned why it's best to avoid certain custom key bindings.
I have hold crouch as Alt because of Warframe.
And I put my shield button as 4 just because it was free.
So after downing an enemy, I was crouching behind cover... and I had time to heal... and I accidentally hit F4 instead of 4.
My teammates were happy about that.
Fun story, if you relaunch Apex right away, you still get back into your Arena match by the next round even when you've been mercilessly slaughtered.