[LG G5 ROMs, Kernels, Recoveries, & Other Developme] shadow52:
[MENTION=2881807]x86cpu[/MENTION] Many thanks, you have saved me from insanity! No idea how you picked that one needle out of that haystack of a log, but I'm very grateful.

Also quite confused. If you'd asked me this morning I would have sworn I'd tried vanilla 16.0 in my tests, but I must have messed something else up. I also tried a few different versions of OpenGApps and the latest MindTheGApps.

Anyway, I tried again today after seeing your message and a clean flash of 16.0 boots fine without gapps. I still get a reboot to TWRP though with gapps, even with the latest (open_gapps-arm64-9.0-super-20191115.zip) and the following gapps-config.txt

Include

# Pico+
CalSync # Install Google Calendar Sync (if Google Calendar is being installed)
DialerFramework # Install Dialer Framework (Android 6.0+)
GoogleTTS # Install Google Text-to-Speech Engine (Micro+ on 5.0-, Pico+ on 6.0+)
PackageInstallerGoogle # Install Package Installer (Android 6.0 only & Android 8.0+)

# Nano+
BatteryUsage # Install Device Health Services (Android 7.1+)
#FaceDetect # Install Face Detect Library
#FaceUnlock # Install Trusted Face
Markup # Install Markup (ARM64 + Android 9.0+)
Search # Install Google App (excluding excludes GoogleNow/PixelLauncher)
Speech # Install Offline Speech Files
#Wellbeing # Install Digital Wellbeing (Android 9.0+)

# Micro+
CalendarGoogle # Install Google Calendar
ExchangeGoogle # Install Exchange Services
Gmail # Install Gmail
GoogleNow # Install Google Now Launcher (Android 4.4 only) (requires Search)
PixelIcons # Install Pixel Icons (Android 7.1 only)
#PixelLauncher # Install Pixel Launcher (Android 5.0+) (requires Search and Wallpapers)
Wallpapers # Install Google Wallpapers (Android 5.0+)

# Mini+
CalculatorGoogle # Install Google Calculator (Android 5.0+)
CarrierServices # Install Carrier Services (Android 6.0+) (required for Google Messages)
ClockGoogle # Install Google Clock
Maps # Install Google Maps
Messenger # Install Google Messages (except on tablet devices) (requires Carrier Services)
#Photos # Install Google Photos
TagGoogle # Install Google Tags (Android 5.0+)
YouTube # Install YouTube

# Full+
#Books # Install Google Play Books
Chrome # Install Chrome
#CloudPrint # Install Cloud Print
Drive # Install Google Drive
#Keep # Install Keep Notes
#Movies # Install Google Play Movies & TV
#Music # Install Google Play Music
#NewsStand # Install Google News
#PlayGames # Install Google Play Games
#Talkback # Install Android Accessibility Suite

# Stock+
AndroidAuto # Install Android Auto (Android 5.0+)
CameraGoogle # Install Google Camera (Android 6.0+)
ContactsGoogle # Install Google Contacts (Android 5.1+)
#DialerGoogle # Install Google Phone (Android 6.0+)
#Duo # Install Duo
#GooglePay # Install Google Pay
KeyboardGoogle # Install Gboard
PrintServiceGoogle # Install Print Service Recommendation Service (Android 7.0+)
#StorageManagerGoogle # Install Smart Storage (Android 7.0+)
Translate # Install Google Translate
VRService # Install Google VR Services (Android 7.0+)
WebViewGoogle # Install Android System Webview (Android 5.1+) (WebViewStub is installed on Android 7.0+)
WebViewStub # Install Android System Webview (Stub) (Android 7.0+) (See note with WebViewGoogle)

# Super+
#ActionsServices # Install Actions Services (Android 9.0+)
#BetterTogether # Install Better Together (Android 9.0+)
#DMAgent # Install Google Apps Device Policy
Docs # Install Google Docs
Earth # Install Google Earth
#Fitness # Install Google Fit
#GCS # Install Google Connectivity Services (Android 5.1+) (excluding also excludes ProjectFi)
#Hangouts # Install Hangouts
#Indic # Install Google Indic Keyboard
#Japanese # Install Google Japanese Input
#Korean # Install Google Korean Input
#Pinyin # Install Google Pinyin Input
#ProjectFi # Install Project Fi (Android 5.1+)
Sheets # Install Google Sheets
Slides # Install Google Slides
Street # Install Google Street View
#Zhuyin # Install Google Zhuyin Input

I shall continue testing and report back, now there is a light at the end of the tunnel.