Program hangs when I close connection to teradata db

Hi
When I close connection to teradata db, my program hangs. This is happening randomly not every time. When I collected dump I found it hangs in tdata32.dll file which is teradata odbc driver file.
tdata32.dll file version is '14.10.0.0'
Below is call stack trace where program hangs.
ntdll.dll!_NtWaitForSingleObject@12