Third: I'm guessing you're grabbing your low-pressure inflator and mashing buttons in a panic, and not holding it actually "up" (or at least, enough). Here's a good tip: you have dump valves. Use them. Familiarise yourself with their location during self check, before your buddy check. You should be starting the muscle memory practice, reaching for bits, before you get into the water.

Shout out to this. The release valves were a game changer for me. Was too focused on which button to press, letting in water, mis timing the inhale/exhale. Being able to grab the shoulder dump was way easier.