[Gismo112]

I have the same NUC and Libreelec-Version on SSD. My Kodi runs without the issues you written.

To get the Problem resolved, check for new Bios-Version.

After update (or when newest installed):

• Press F2 when prompted during boot to enter BIOS Setup.
  
• Press F9 to set all BIOS options to default values !!
  
• Select Advanced.
  
• On the Devices and Peripherals > SATA menu, Chipset SATA Mode is set to AHCI.
  
• On the Devices and Peripherals > USB menu, USB Legacy is enabled (checked).
  
• On the Devices and Peripherals > Video menu, IGD Minimum and Aperture Memory is set to 512 MB.
  
• On the Boot > Boot Priority menu:
  
• UEFI Boot is enabled and set to Linux . Fast Boot OFF !!
  
• Legacy Boot is enabled (checked).
  

Then Save and Restart to Test.

If this not help, create a new different Libreelec Boot-Device (USB / SDCARD) an testing with this.