some key:values not saving on secure mode

[manatax]

When I use the {secure:true} option some of the key:values are not stored.
I have 3 different keys, the 3 are saved properly when I don't use the secure option, but only (the shortest) 2 are saved when I use the secure option.
The structure of the object value that is not saved looks something like this:
{
attr_a: {
attr_a_1: someValue_1,
attr_a_2: someValue_2,
attr_a_3: someValue_3,
attr_a_4: someValue_4,
},
attr_b: [
{
attr_b_1: someValue_1,
attr_b_2: someValue_2,
attr_b_3: someValue_3,
attr_b_4: someValue_4,
attr_b_5: someValue_5,
attr_b_6: someValue_6,
attr_b_7: someValue_7,
attr_b_8: someValue_8,
attr_b_9: someValue_9,
},
{
attr_b_1: someValue_1,
attr_b_2: someValue_2,
attr_b_3: someValue_3,
attr_b_4: someValue_4,
attr_b_5: someValue_5,
attr_b_6: someValue_6,
attr_b_7: someValue_7,
attr_b_8: someValue_8,
attr_b_9: someValue_9
},
{
...
}
]
}