LMB stop working every couple minutes (brand new Deathadder Essential)

Razer Deathadder Essential: Left Mouse Button randomly stops working every couple minutes I can still move a cursor but LMB does nothing. Weird part: clicking RMB fixes the problem, LMB starts working again for some time until it happens again I've tried:

• Doing a clean reinstall of everything: drivers, synapse, reset settings etc.
• I have only Central and Synapse 3 installed (and updated), no other modules.
• Using different USB ports
• Haven't changed any razor factory setting, no custom profiles, no macros, everything is on default.
• All my drivers are up to date, windows is up to date, all my apps are up to date etc, my system is perfectly maintained and flawless.

I can't tell if the mouse is broken and i should get it replaced, or if it's a software problem that can be fixed. Update: I just noticed something. Even though i can't click LMB on anything, i still can drag and resize some windows, move scrollbars etc. but only some windows, other still completely ignore LMB. i have no idea how that works.