Welcome to Geekhack!
Sorry that your first post is to seek help with a problem.
I have two Ducky Shines (both version 1). I must admit I have not examined each switch that closely. On one of mine some of teh MX blue switches do not click all the time, otherwise everything's good.
Have you swapped keycaps out a lot? Is it possilble that you might accidentally have caused this?
I only ask because thousands of switches pass around here all the time, and I haven't heard of this particular problem before.
However it is possible that this is one bad switch.
I have not idea how Tiger Imports would handle a warranty return, however someone a while back said they had problems contacting Ducky in Taiwan to return a keyboard.
It looks like a bit of plastic is missing. If it fell into the switch you would almost certainly need to disassemble the switch to remove it, which means desoldering the switch as it is plate-mounted. In that case you might as well just solder a new switch in its place.