I’m using fully remappable hotkeys - construction menu 1 is set to B, however with Malians it seems to be automatically set to default (Q) despite me having a custom hotkey profile and only having B as the hotkey.
No issues on Ottoman or other civilizations.
edit: I forgot to check but the building construction hotkeys 1-2-3-4 are set to Q W E R instead of what my custom hotkeys are set to as well for clarification.