Was it a blooper???

was it a blooper and if not then how cud Bala didnt recognize Sarika...???
when many months ago param was assaulted by raman for doing wrong with sarika and ishita...Bala and iyer family also did too came over thr when Param's truth was revealed out 🤢by raman and sarika told them his truth...Dear Bala is suffering from amnesia...or cvs might hve made him gajni too...🤢😕