Ornamental Kiwi Vine- Problems with growth

We have a kiwi plant located on a east facing wall of our house in Victoria. It has one main stalk and is growing on laddis over the windows. In the spring, the plant looked healthy. It grew in length and the leaves had lots of pink tips.

For a few weeks now, the plant is looking more unhealthy (see attached photos). The most distal leaves are drying off, or dying. Despite what we thought was adequate watering, the main stalk (as pictured) has a patchy appearance. Leaves (as pictured) show signs of becoming someone's snackbar.

We have consulted a local nursary with photos and leaf samples. They have further referred us to this site. Please let us know if you need more information to provide any recommendations or tips.

Thanks!