Don’t think it is lovers tiff. Apollo hospital sources reveal that since Cherry has taken Ayyappa Deeksha, Upasana has decided not to disturb or divert him throughout the Deeksha. Hence, she took the tough decision, as per sources.
If Charan calls Upasana or vice-versa, the disturbance is for Charan. And there should be no romantic ‘disturbances’ during Ayyappa Deeksha. That is why Upasana took this decision and it is heard that Cherry knowing the reason behind this decision has developed more love for Upasana.