FPR #6 Chrome Extra Fine Nib

I bought this to replace the nib that came with my Jaipur V2. There was nothing wrong with the nib that came with the pen; I absolutely loved it. But I caught my fiancée treating it like a ballpoint pen that won’t write. I am very new to fountain pens and when I put this nib in, it was loose. A little outward bend at the base of the nib, on each side created a perfect fit. I have my Jaipur V2 in Ruby Cracked Ice fitted with the FPR #6 nib in extra fine, and filled with Diamine Wild Strawberry. It writes excellent. Thank you.

Frustrated

I can not get this nib to stay in the pen