sometimes adding in plugins creates some prblems. I had some like that but they were all sorted.
Try uninstalling your plugins one by one and try it. Sometimes the pre/post handle hooks cause problems for unknown reasons. Often a simple re-install fixes things equally for unknown reasons.
That is possibly the only advice anyone would give. You have to find whatever it is that is causing the problem, and it is trial and error. Every time you add in a plug-in ALWAYS thoroughly test out your system, test every function. Install one at a time - and test each time.