My notebook has dual boot with windows 10 and debian kde. If I an into debian and I hibernate the computer when I try back into the system I am completly losting the wifi connection. I cant even see the driver on terminal.
To back to work I need to reboot the computer and go to windows login page. Then the wifi works. And then I reboot into debian and it works properly too.

Do I need to reinstall something?

Distro: Debian 9
KDE Plasma Version: 5.8.6
KDE Frameworks Version: 5.28
Qt Version: 5.7.1
Kernel Version: 4.9.0-8-amd64
Os Type: 64-bit

Could be the older versions on your system - there was an issue I experienced a few kernels back that caused the same issue with my ethernet network would not come back after sleeping. A reboot or restarting the network systemd was the only temporary fix. Not sure when this issue appeared but I believe Kernel 4.15.0-24 fixed the issue. See if there are newer updates that gets you to that Kernel or newer.