Has any one lost their monoprice lock buttons yet?

I have a monoprice lock installed in our back porch and yesterday I just noticed it was already missing 2 of the buttons! I will have to check my receipt to see if this is still under warranty.

Warranty is still good, the downside is I have to send the defective one first before I get the replacement. I will have to remove the damn lock from all the apps using it :rolling_eyes: