BQ34110: Delay after UNSEAL

I am having an unexpected behavior when I unseal the BQ34110. I have written a test routine where I sequencially seal and unseal BQ and check the status. The unexpected behavior occurrs when I do an unseal (no full access). The status simply returned the sealed status aftwards. Only after I added a long delay (four seconds - line 45 on the excerpt below) I was able to successfully get the status with the unsealed bits.

The funny thing is if I do a full unseal sequence (unseal key followed by full access key), a long delay is not required. Is this the expected behavior? I could not find the information in the TRM. 

I noticed though that with BQStudio adds a long delay after clicking on either UNSEAL and UNSEAL_FULL_ACESS buttons.

Below is an excerpt of the test function. I hope the code is sufficiently self expanatory.

static void test_seal_unseal (void)
{
	int res;
	uint16_t wait = 50;
	
	// Force unseal full access
	{
		res = bq34110_unseal (&default_keys, true);
		UTEST_ASSERT (res == 0, "");
		wait_ticks (wait);
	}

	// Check unsealed status
	{
		uint16_t ref = 0xFFFF;
		uint16_t op_status = ref;
		
		res = bq34110_ctrl (CTR_OPERATION_STATUS, READ_OP, &op_status);
		UTEST_ASSERT (res == 0, "");
		UTEST_ASSERT (op_status != ref, "");
		UTEST_ASSERT ((op_status & 0x0006) == 0x0002, "");
	}

	// Seal BQ34110
	{
		uint16_t ref = 0xFFFF;
		uint16_t op_status = ref;

		res = bq34110_ctrl (CTR_SEAL, WRITE_OP, NULL);
		UTEST_ASSERT (res == 0, "");
		wait_ticks (wait);

		res = bq34110_ctrl (CTR_OPERATION_STATUS, READ_OP, &op_status);
		UTEST_ASSERT (res == 0, "");
		UTEST_ASSERT (op_status != ref, "");
		UTEST_ASSERT ((op_status & 0x0006) == 0x0006, "");
		
	}
	
	// Unseal (not full access)
	{
		uint16_t ref = 0xFFFF;
		uint16_t op_status = ref;

		wait_ticks (wait*80);
		res = bq34110_unseal (&default_keys, false);
		UTEST_ASSERT (res == 0, "");
		wait_ticks (wait);

		res = bq34110_cmd (CMD_OPERATION_STATUS, READ_OP, &op_status);
		UTEST_ASSERT (res == 0, "");
		UTEST_ASSERT (op_status != ref, "");
		UTEST_ASSERT ((op_status & 0x0006) == 0x0004, "");
	}

	// Seal BQ34110 again
	{
		uint16_t ref = 0xFFFF;
		uint16_t op_status = ref;

		res = bq34110_ctrl (CTR_SEAL, WRITE_OP, NULL);
		UTEST_ASSERT (res == 0, "");
		wait_ticks (wait);

		res = bq34110_cmd (CMD_OPERATION_STATUS, READ_OP, &op_status);
		UTEST_ASSERT (res == 0, "");
		UTEST_ASSERT (op_status != ref, "");
		UTEST_ASSERT ((op_status & 0x0006) == 0x0006, "");
	}

	// Unseal (full access)
	{
		uint16_t ref = 0xFFFF;
		uint16_t op_status = ref;

		res = bq34110_unseal (&default_keys, true);
		UTEST_ASSERT (res == 0, "");
		wait_ticks (wait);

		res = bq34110_cmd (CMD_OPERATION_STATUS, READ_OP, &op_status);
		UTEST_ASSERT (res == 0, "");
		UTEST_ASSERT (op_status != ref, "");
		UTEST_ASSERT ((op_status & 0x0006) == 0x0002, "");
	}
}