Some questions - Trijicon HD Night Sights Orange Front Outline, Glock 42, 43

I had these sights installed on my Glock 43x late last year. I have put approximately 700 rounds through the pistol. I recently noticed there is some play in the rear site just to finger touch. It moves very slightly to the left and right. It also seems to move forward and backward some at the ends of the sight base. I have emailed Trijicon about this issue to see if they have any input. Prior to this observation, I was very satisfied with the sights and would have recommended them. At this point, I am waiting to see what Trijicon has to say. I have owned and used many Glock pistols with Trijicon night sights and never encountered this problem. I don't know if this could be a manufacturing defect. The pistol has not been treated roughly or banged around. I can't imagine what would loosen up the sight except recoil.