Buxus hedge leaves curling

Hello Guys. I have moved into a new house 6 month ago and we have a buxus hedge in the garden. Worth mentioning that it is riddled with ivy, which I have been purging for some time. I noticed that there are few sections of the hedge where the leaves are shriveled and curled up. When cut, the new growth comes out curled us as well. Interestingly the ivy is affected in those areas too, the leaves are curling and looking almost like a scrunched up paper. I will try and post few pictures. Any advise on what it could be and how to tackle the issue is most welcome.

Thank you in advance!

 

yes we need pictures really.

 

Here are some pictures for you. This part of the hedge is not that severe, but is bad enough for you to see the changes in the leaf shape I mentioned above.