Hello! I've been playing for 5 hours and I came to realize I picked up and evolved weapons but I couldn't use them. I checked the game controls and changed the keys and nothing works. Is this happening just to me? Or is it a common issue? Please help, I'm loving the game so far.
PS: Sometimes when streaming the game and Alt+Tab the game freezes and crashes everything else. I fix it by logging off the Microsoft account to force the close up and restarting everything.

My specs are:
CPU: Intel i7 6700 Skylake
Mother: Asus Z-170-A
RAM: 2x Corsair Vengeance 8Gb DDR4 a 3000mhz RGB u
GPU: Asus GeForce GTX 1050Ti Strix
ROM: 1x WD Black HDD de 2TB - 1x WD Blue HDD de 1TB - 1x SanDisk SSD de 480GB - 1x WD Black HDD de 1TB
Mouse: Mionix Castor Frosting
Keyboard: Razer Blackwidow Chroma
Webcam: Logitech C920
Audio: Focusrite Scarlett Solo

Thank you. Regards.