Tkinter treeview wrap text only working in first row

Question

I have referred the answer from this link Wrap text inside row in tkinter treeview

But it seems it is working only first row of records. When second row get added in treeview it is not sitting next to first row. first row and second row records overlapping. I am using for loop to add records in treeview.

def wrap(string, lenght=8):
    return '\n'.join(textwrap.wrap(string, lenght))

for i in list:
  tree.insert('','end',values=i,wrap(value))