What type of memory loss is this?

I didn't understand what type of memory loss for vishnu. In yesterdays episode he talked something to nani and then to meethi also. But today he talked good to nani and then muktha also. He talked good to akash first then he felt dizzy and angry at him and says something na. What is this type of memory loss? Do share u'r views

Even CVS doesn't know dis de..
They are trying somethin..let's see