Dmark USSD transport sends non-empty content on the first message of a new session

Dmark USSD transport sends non-empty content on the first message of a new session: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). I'm building a USSD menu application on top of Vumi and using the Dmark USSD transport to handle inbound traffic. My application…