Issues while updating the handle having special characters #28
Description
It has been observed that when updating handles containing special characters such as curly braces { } , the handle does gets updated but the previous entry still remains in ES database.
This causes the old handle to be displayed at places.
For eg. Handle "jmjmohanp3L" was previously "jmjmohanp{3L}" . it has been changed now but still in challenge regisration page the old one appears.