Every year a few weeks after my laburnum flowers all the leaves fall off. any ideas?

sounds like me after a hard day gardening... pooped! im a newbie to the gardening world but if this happens everytime maybe thats what it does?

be interesting to know if they do, do this?

im intruiged now hope someone can help you

x x x

I have the same problem, it looks like something is eating the leaves too, nibbling semi circles around the edges of the leaves. I have a problem with black spot in my garden so I was wondering if it could be a form of this?