Fonts on Startup and login screen - question marks

After boot/re-boot all fonts on the login screens are replaced with the question mark-in-square character.

My user folder is hosted on a second SSD, not the startup SSD.

This issue is not present on the lock screen.

The issue clears up in safe mode.

Login Screen

Lock Screen

I have done the steps here: MacBook - characters in login screen replaced by question marks - Ask Different

• Validated all of the fonts

  I have a lot of duplicate fonts and one font that has a bad 'kern' table structure and contents.

• Cleared the font caches while logged in to my user account:

atsutil databases -removeUser

sudoatsutil databases -remove

atsutil server -shutdown

atsutil server -ping

I haven't removed duplicate fonts yet, but many of them have been disabled.

I'm not sure it matters, I have encrypted drives.

Hardware Overview:

Model Name: MacBook Pro

Model Identifier: MacBookPro8,1

Processor Name: Intel Core i7

Processor Speed: 2.7 GHz

Number of Processors: 1

Total Number of Cores: 2

L2 Cache (per Core): 256 KB

L3 Cache: 4 MB

Memory: 16 GB

Boot ROM Version: MBP81.0050.B00

SMC Version (system): 1.68f96

System Version: macOS 10.13.6 (17G65)

Kernel Version: Darwin 17.7.0

Boot Volume: Macintosh

Boot Mode: Normal

Computer Name: **************

User Name: ****************

Secure Virtual Memory: Enabled

System Integrity Protection: Disabled

Time since boot: 4:10