Bismillah This is a sign the shaykh isnt a kamil shaykh because he has to know how to fix the state and warn the murid before these things happen. I have had personally experiance with lights/vision. You usually have to inform the shaykh and he will tell you if its truthful or tainted by jinn interference. Many times it is the jinns interfering such as with visions, swirling blue lights etc. Once told to the shaykh the shaykh can close down certain things so you are not able to witness such things and stay normal. Even if the murids doesn't listen he still does certain things for the murid to stay away and gives warning 3 or more times before he lets him do as he likes. I have seen this happening with people simple reciting kalimah in excess amount of times and also with other powerful adhkar.