Miele W5748 - Water not draining from the Fabric Conditioner Compartment

Hi, first post - thanks in advance for any help given. Apologies if I've posted this in the wrong place?

I have Miele W5748. After a wash the fabric conditioner tray is left full with water. It's dispensing the fabric conditioner fine, but the residual water is not draining. I have removed the tray and thoroughly cleaned, and the outlet at the rear of the tray in the bottom left hand corner is clear. Today I have also cleared the nozzles on the roof of the compartment, but they didn't seem too clogged up. I have seen articles elsewhere that are non-specific to Miele and some mention that there should be a tube running from the tray. Mine doesn't have one - but don't know if that's through design or not?

Thanks!