I am currently going through this as well. My whole right side feels weaker and is definetely lagging behind recently in turms of size and strenghth. I am losing the muscle/mind connection with my right side which is strange. I've been training for a long long time so this is quite nerve racking. I am continuing to do research on this and will post any findings when i get them. I'm going to assume this going to be more mental than anything, compensation or something not really sure. But YES this sucks!