My take on this is that they have had a number of decisions go against them that previously they were likely to have benefitted from. That's not to say that they have been unlucky, it's just that they have been called out for the decisions they receive.
Don't let any of this fool you, things were getting so blatant that the powers that be had little option other than to allow some of the 50/50 decisions to go against them.
Just wait, I am fully expecting some dodgy decisions to now start going for the Rags and they will point to examples like this to justify it.