"enum": [":"] is raising an invalid exception while rendering Liquid template CSharp/Enum

[ALCHEMY-ALAMBIK]

Describe the bug

Use a json enum in a model with semi column as a value: "enum": [":"]

This raises the follwing exception:
System.InvalidOperationException: Error while rendering Liquid template CSharp/Enum:
Index was outside the bounds of the array.
at NJsonSchema.ConversionUtilities.ConvertToUpperCamelCase(String input, Boolean firstCharacterMustBeAlpha)

Version of NSwag toolchain, computer and .NET runtime used

All

To Reproduce

Typical API case:

"preferenceHourMinuteSeparator": { "type": "string", "description": "preferred separator between hour and minute", "enum": [ ":", "." ] }

Expected behavior

No error

Additional context

Thsi was found using API from SAP CONCUR wich JSON can be found here:
https://api.sap.com/api/ConcurIdentityV41/overview