Incorrect result using TIME() to parse a string into time

[Aiee]

The outputs of TIME() and DATETIME() are filled with 0 in microseconds.

(root@nebula) [(none)]> return time("11:07:59.899023")
+-------------------------+
| time("11:07:59.899023") |
+-------------------------+
| 11:07:59.000000         |
+-------------------------+
Got 1 rows (time spent 757/1136 us)

(root@nebula) [(none)]> RETURN DATETIME("2021-07-19T11:01:03.123")
+-------------------------------------+
| datetime("2021-07-19T11:01:03.123") |
+-------------------------------------+
| 2021-07-19T11:01:03.000000          |
+-------------------------------------+
Got 1 rows (time spent 633/977 us)

Expected behavior