May 19, 2019
Thpmpsons Station. TN 37179
May 20, 2019
It would be hard to say without photos. The problem is likely on the opposite end of growing too fast, though. Usually fungal infections are the cause of trees collapsing, but it can have other factors, such as too much shade, or even down to a lack of silica in the soil.
Please provide some photos, and I will be more than happy to help diagnose your tree.
In the meantime, this article will help you with the care of these trees: https://www.gardeningknowhow.com/ornamental/trees/oak/columnar-oak-trees.htm