First, verify correct behavior with:
1. Open the Eden editor.
2. In Attributes -> Presentation -> Title, set a custom scenario name.
3. Save the scenario, **unchecking the binarize option**.
4. Host multiplayer server and examine name in scenario selection.
To reproduce:
5. Return to the Eden editor and load the previously saved scenario.
6. Tweak any option in the multiplayer section (I tried Multiplayer -> Type -> Game Type -> COOP)
7. Save, once again making sure the scenario is text-based.
8. Host multiplayer server and examine name in scenario selection.
Reproduced on ARMA III v1.64.138732