I have a vine that runs up one corner of my house and and across my front eves. About 50% to 60% of the leaves (worse in some areas) have turned brown. I'm wondering with the harsh winter whether it just took a beating or whether something really bad is happening. It's been there for years and the neighbour said it's never looked like this before. We're new to the house and haven't gone through a season, so I don't know what's normal. see attached images.