Q: Need to reset NVRAM on every boot

Hi there,

I have a MacBook Pro (early 2015). When i turn on FileVault i have to reset the nvram every time i reboot my Mac. If i don't do this the Mac reboots very slow and when it is booted in OSX i have to wait 30 seconds for every keystroke when entering my password. When i do a hard shutdown and nvram reset my MacBook Pro starts fast and i can login normally. When i reboot the issue is back.

What i have tried:

- Create a install media for OS X El Capitain, booted recovery mode, erased Macintosh HD and did a clean install.

- Entered internet recovery mod, erased Macintosh HD and did a clean install.

- NVRAM/PVRAM reset (a lot)

- Tried SMC reset (i cannot verify if this worked?)

I'm really out of ideas. This thing started a while back when i used Bootcamp. But now with a clean install i still have this problem.

When i turn of FileVault the Mac still boots slowly but i can enter my password on normal speed.

Thanks in advance.