x2 on the working fast. I use aftermarket air bags and make sure I have truck turned off during the process.
One thing I see in your unhook process (assuming I am reading it correctly) is that you release tension off the jacks, then you enter travel mode which drops the back even further. If that is indeed the case, then you need to check the spring jacks again and make sure you have all the tension off them prior to unhitching.
I always make sure I have the truck off and simply leave the bags where they are pressure wise. Once I have released the screw jacks and am ready to unhitch then I raise the trailer till pressure is off hitch. Get in truck, start, and pull out. Bags don't have time to inflate enough to make a difference.
I used to deflate and such prior to unhitching, but I don't bother to do that as I found it streamlines my unhitch process.
Hope this helps.
