The quickslot menu needs to be hold RB to bring menu up -> select moving RS -> release RB to equip. The way it is now (hold, select, press A to equip) is causing players to jump instead of equipping. Especially during a firefight it is very un-intuitive and causes frustration. Most of the games that use this mechanic use the hold -> select -> release sequence.
While we are at this topic, there's a missing button right now (quick equip first item of quickslot). It used to be Y before the patch. You can map it to tap RB now, so that if we tap RB it cycles through our quickslots starting from the top.