It should be temporary. I know what you are getting at. A great flaccid state is plumped up and perfectly pliable. A hard or tight flaccid just isn’t.
It can well be a negative PI from overtraining. It should go away with time, and it might be wise to try and reduce the intensity of your PEing to get back to normal more quickly. I also get it from too much jerking off/ sex… should I avoid them?!? The good news… they don’t give it to me nowadays… or maybe I just use my penis less? :(
As for prevention. The more conditioned your penis becomes to your PEing, and the more sensible you are with regards to overuse or overtraining, then the less likely you are to get it. Other than that, warmth, stay hydrated, etc. are things I used to combat this state with varying levels of success.