fails when a grand child nested type have NULL #1098

Describe the bug
Lets say you have type of an object with three layers, i.e grand parent, parent and child type.
for example m_package_tab

m_package_obj( a varchar2(2), b number, t_parent_tab( p_ame varchar2(100), c_child_tab(name varchar2,age number)))

and lets say for our data, our child_tab we have null data,
and when you compare the data using following, you will get an error saying Fetched column value is NULL

ut.expect(anydata.convertcollection(l_package_tab)).to_equal(anydata.convertcollection(l_test_package_tab)).unordered;

OUTPUT:
ORA-01405: fetched column value is NULL
ORA-06512: at "UTP3.UT_DATA_VALUE_REFCURSOR", line 336
ORA-06512: at "SYS.DBMS_CRYPTO_FFI", line 159
ORA-06512: at "SYS.DBMS_CRYPTO", line 86
ORA-06512: at "UTP3.UT_UTILS", line 868
ORA-06512: at line 1
ORA-06512: at "UTP3.UT_DATA_VALUE_REFCURSOR", line 331
ORA-06512: at "UTP3.UT_DATA_VALUE_REFCURSOR", line 384
ORA-06512: at "UTP3.UT_DATA_VALUE_ANYDATA", line 129
ORA-06512: at "UTP3.UT_EQUAL", line 229
ORA-06512: at "UTP3.UT_EXPECTATION", line 26
ORA-06512: at "UTP3.UT_EXPECTATION_COMPOUND", line 146

Workout Around
ut.expect( xmltype( anydata.convertCollection(l_package_tab ) ).getClobVal() ).to_equal( xmltype(anydata.convertCollection(l_test_package_tab) ).getClobVal() );

There is also problem with workout Around as the order of the output does not match. I cannot use .unordered with perhaps three layer nested loop or with xmltype. Not sure why.

utPLSQL version : v3.1.10.3349