This is what I have observed too, and I have commented on it in one of the previous post in this thread. When you heal all the injuries or sell all the injured players and buy replacements, another 'storm' or 'half-storm' comes. Some things have become so evident in this game. Users like you and Medo are now confirming some of the things that I have suspected but have been evident lately, and thus, almost confirmed. There are many trends that I have observed in this game; some of it has been discussed in my previous posts.
By the way, some people from Nordeus might tell you that the maximum number of injuries per match has been set to 1 as compared to before, but then, what if you play 20 matches and get 15-20 injuries? This is still excessive and unacceptable. Even 10 injuries from 20 matches is still unrealistic. I think that the people concerned with this know well up to what extent injuries can occur in this game and hence, what has happened is likely to be intentional. It is more likely to be a business strategy, but an abusive one.