Memory leak issue in Profilegeneric

I am trying to read Loadprofile from profile generic.
but every time when i try to read data,it will occupy some memory (some bytes) which will not free.for example when i try to print "Get Free heap Size" after reading data then for 1'st time it is 172868(bytes),2'nd time 172352(bytes),3'rd time 171830 etc.. so every time it will occupy around 400 to 500 bytes.

Please help me to solve this issue. My code is as below.I am using ESP32 controller.

In this code,i am comparing obiscode,if obiscode match with loadprofile obiscode then i will read data from loadprofile and then free the memory.
but still it occupy some memory every time.
(i am rotating 'for' loop till loadprofile then break the loop)

oa_init(&objects);
ret = oa_getObjects(&_meterSettings.objects, DLMS_OBJECT_TYPE_PROFILE_GENERIC, &objects);
dlmsbb_init(&ba);

for (pos = 0; pos != objects.size; ++pos)
{
oa_getByIndex(&objects, pos, (gxObject**)&pg_1);

if(Loadprofile obiscode)
{
com_read((gxObject*)pg_1, 3);
com_readRowsByEntry(pg_1, 1, 5);

for (r = 0; r != pg_1->buffer.size; ++r)
{
ret = arr_getByIndex(&(pg_1->buffer), r, (void**)& va);

for (c = 0; c != va->size; ++c)
{
ret = va_getByIndex(va, c, &tmp);

ret = arr_getByIndex(&(pg_1->captureObjects), c, (void**)& kv);

//reading load profile data here
}
}
obj_clearProfileGenericCaptureObjects(&(pg_1->captureObjects));
obj_clearProfileGenericBuffer(&(pg_1->buffer));
arr_clear(&(pg_1->buffer));
arr_clearKeyValuePair(&(pg_1->buffer));
oa_empty(&objects);
oa_clear(&objects);
bb_clear(&ba);
break;
}
}