"Change Map" button does not respect Mode Mappings.

I have a custom gamemode added to the Ewok Hunt tab via modeMappings. Mode3Indoor:Mode3. I started a server open to Mode3. After the server launched, I pressed CHANGE MAP > Ewok Hunt > custommapname. According to the logs, the command executed was Kyber.LoadLevel S8_1/Endor_04/Endor_04 Mode3. It should have instead loaded Mode3Indoor.