WARNING: This page is about a different car, the 2016 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.
Inspect the urethane seal for damage and cracks.
Fig 1: Identifying Drain Hose Bracket Urethane Seal
Courtesy of MAZDA MOTORS CORP.
If there is any malfunction, replace the drain hose bracket.