One of our members had simular problem with lost connection with PnkBstrB.exe and handshake, getting kicked all the time.
What i did was uninstalled PB with pbsvc.exe, I deleted the folder PB in the game folder deleted PnkBstrA.exe in the system32 folder,rebooted(u need to do that)
Reinstalled PB again and finally run pbsetup.exe.
Worked for him, he doesnt get kicked for lost communication nor the handshake error anymore