No leaves on middle 1/2 of purple leaf birch
I planted a purple leaf birch tree about 2 years ago (planted during the winter, bare root) and there has never been any leaves on the middle section of the tree. There are a few thin branches coming from the main stem but they look dead and there are no buds on them. This has been the same each year since it was planted. There are leaves on the lower branches and lots on the top.
Do I cut off the branches and hope new growth forms from the stem? And what could have caused this?
Hope the pictures are ok.