AutoConfig Complex Lists fail to load

[Nolij]

How to reproduce:

• store a complex list (list of custom class) in the AutoConfig of a mod
• launch the client
• add items to the list in the config (it should load in the cloth config screen properly)
• save & quit
• relaunch the client
• open config screen

Expected outcome:

• added items should load and show

Actual outcome:

• list is reset to its default value

Effected version: 6.0.45

It is noteworthy that the items in the list are properly serialized and saved to file, and when adding a custom deserializer for the type being stored in the complex list and confirming it does successfully deserialize the items from the file this issue still occurs.

[Nolij]

Update: Switching from Jankson to GSON fixes this.

Is this just an issue with upstream Jankson?