I believe my coach is very similar to yours.
My coach certainly doesn't 'rock the coach' when I dump air. It's a very gradual drop that takes 2-3 minutes to deflate fully.
As long as the air dump switch is off, they should inflate in a similar 2-3 minutes.
The bags won't inflate properly if you have the levellers down. You should fully retract the jacks before inflating otherwise, the ride-height valves will just release the pressure again.
What pressure do you see on the air gauges?
Chris, Jo & Dell (Siberian Husky - 110lb of fur and muscle)
2003 Beaver Santiam 40DST - Cummins 330ISC
Closely followed by a 2012 Equinox AWD