Are you possibly conflating 2 different things, namely strength and endurance? I think that latter declines much faster than the former. One reason that I wonder about this is that you tend to use short rests between sets, I think.
I looked at one of your workouts from a couple of weeks ago and the numbers don't look that different. A lot of the exercises are different though, which makes comparison harder.
90 minutes of cleans and snatches ought to get that endurance back. Seriously, sounds like fun, though tiring and hard to do technique-oriented work for that long.