Razer Deathadder Elite

Mouse bought January 4th 2019 - Amazon Prime.
Working fine mechanically, cosmetically however the right hand side rubber pad has come loose - after 3 months of use (and I barely touch that side).

I don't mind "fixing it" myself but for a £55 quid mouse, id expect a wee bit more robustness about it.

Can I just glue that pad on? Will this affect any sort of warranty?

thanks

Liam