Crash on RaiseException or freeze when rendering Malaylam text using the Advanced Text Generator in a specific project

How to reproduce:
1. Open the attached “IN-98172_MlText.zip” project
2. Open the “Assets/Repro” scene
3. Ensure Advanced Text Generator is enabled
4. Enter Play Mode
5. Select the “Malaylam” locale (top right of Game View)
6. In Game View, click on the green cog icon
7. Observe the crash/freeze

Reproducible in: 6000.0.45f1, 6000.1.0b13, 6000.2.0a8
Could not test with: 2022.3.60f1 - compilation errors when downgrading the project

Reproducible on: Windows 11
Not reproducible on: No other environments tested

First few lines of stacktrace:

0x00007FFB275CAB6A (KERNELBASE) RaiseException
0x00007FFA4C74C082 (Unity) LaunchBugReporter
0x00007FFA4C010BBF (Unity) EditorMonoConsole::LogToConsoleImplementation
0x00007FFA4C0116BA (Unity) EditorMonoConsole::LogToConsoleImplementation
0x00007FFA4CCC489D (Unity) DebugStringToFilePostprocessedStacktrace
0x00007FFA4CCC3C38 (Unity) DebugStringToFile
0x00007FFA4AC2029D (Unity) MemoryManager::Allocate

Notes:

• Only the Editor freeze was reproduced by CQA
• Issue does not reproduce if Advanced Text Generator is disabled