Mod Savegame Settings menu only shows SML — Array_Sort comparator not found in Widget_SessionSettings (3.12.0)

SML version: 3.12.0+827
Game version: Satisfactory 1.2, Build 502094 (Steam)
Platform: Windows 11 25H2

Description

The "Mod Savegame Settings" menu (Session Settings), both at new-game creation
and in the pause menu, only ever shows the SML "Cheats" category
("Force Allow Cheats"). No other mod's registered Session Settings appear,
even though ~29 mods are loaded successfully with no other errors in the log.

I suspect this is related to the 3.12.0 changelog entry:
"Session Setting main categories are now sorted alphabetically (#406)"

Log evidence

This error appears every time the Session Settings screen is opened —
once at world creation, and again in the pause menu:

LogBlueprint: Error: Array_Sort failed: Failed to find comparator function
Widget_SessionSettingsUser Setting Category Mapping Structure_Comparator
inside of Object /SML/Interface/UI/Menu/Widget_SessionSettings.Widget_SessionSettings_C

LogBlueprint: Error: Array_Sort failed: Failed to find comparator function
Widget_SessionSettingsUser Setting Category Mapping Structure_Comparator
inside of Object /SML/Interface/UI/Menu/PauseMenu/Widget_PauseMenu_SessionSettings.Widget_PauseMenu_SessionSettings_C

Steps to reproduce

1. Install SML 3.12.0+827 on game build 502094 with some mods.
2. Start a new game, OR open the pause menu on an existing save.
3. Open "Mod Savegame Settings".
4. Only SML's own "Cheats" category appears; no other mod's session
   settings are listed.
5. Check FactoryGame.log — the Array_Sort error above appears at the
   exact moment the screen is opened.

What I've already ruled out

• All 29 mods load with no other errors ("List of loaded mods" is clean).
• The separate "Mods" config menu (main menu / pause) works correctly —
  ContentLib and RefinedRDLib both show and load their config data fine.
• Reinstalled the game, reinstalled all mods,
  cleared cache — no change, which points to this being a code-level
  issue in the Widget_SessionSettings sort logic rather than an
  install problem.

Reproduce the issue by opening Mod Savegame Settings at world creation and from the pause menu, then inspect the named Widget_SessionSettings and Widget_PauseMenu_SessionSettings objects and their Array_Sort comparator references. Done means both menus display registered session-setting categories from loaded mods without the comparator error.