Describe the bug
After installing OCLP v0.0.17 to an external USB hard drive and successfully booted on EFI, I was able to start the installation of Big Sur 10.2.2 (also Tried 10.2.1 and 102.3) and select a free partition of the external USB drive for the installation but 12 minutes before the end of installation, the mac reboot and the installation volume is not seen in the volume list and only a new volume named macOSinstaller appears alongside the Big Sur original installer volume. I tried to boot on this macOSinstaller volumes but it ends up to another reboot and the mac restart on its internal SSD recovery partition (a Mojave one)

To Reproduce
Steps to reproduce the behavior:

1. From my current installation (Mojave 10.14.6) download Big Sur 11.2.1 or 11.2.2 or 11.2.3 and install the package to /Application
2. Format an external USB drive with 2 partition (HFS+/GUID) : 1 for the installer, 1 for where BS will be installed
3. Create a BS install disk to /externalusb/Installer partition
4. launch OCLP 0.0.17, mac correctly detected as MacBookPro10.1, build, then install on EFI partition of the externalusb drive
5. Reboot
6. Select EFI
7. Select InstallmacOSBigSur
8. Start the install
9. Installer takes ages to discover available volumes then ask for unlocking with a known account and display a user of my main interal SSD
10. enter password
11. Start install
12. Select the empty free partition on externalusb (named BBS in my setup)
13. Install start
14. after 15 minutes the installer states the install will finish in 12 minutes but the mac suddenly reboot

Screenshots
Console message just before the unexpected reboot:

Volume list after reboot (sorry for the quality). Please note that the volume BBS does not apears but instead a volume named macOSinstaller (trying to boot on it ends up on the mojave recovery partition)

Build Folder
Build-Folder.zip

Hardware (please complete the following information):

• OS Running : macOS 10.14.6 (18G8022)
• OS Patching macOS 11.2.3, Big Sur (but also trie .1 and .2
• Model Patching MacBookPro 10,1 (MacBoo Pro Retina 15" mid-2012)

Additional context

• I upgraded the WiFi card to AirPort Extreme (0x14E4, 0x133)/ Broadcom BCM43xx 1.0 (7.77.61.3 AirPortDriverBrcmNIC-1305.11). During macOS BS install I can select a WiFI network and connect to it.
• I previously tried to install BS Beta using https://dortania.github.io/OpenCore-For-Legacy-Macs/ which ends up to remove the battery to get the mac to boot again (Firmware bricking by macOS).
• I successfully ran BS using https://github.com/barrykn/big-sur-micropatcher but this approach does not allow the use of FileVault
• The macbook pro currently run on Mojave 10.14.6 on internal SSD protected by FileVault 2