Emoji characters causing SQL errors while submitting post

Some emoji characters are causing SQL errors when the post is being submit. Preview is possible. Please see attached screenshots.
Error Message:

General Error
SQL ERROR [ mysqli ]

Incorrect string value: '\xE2\x86\x94\xEF\xB8\x8F...' for column 'post_text' at row 1 [1366]

SQL

INSERT INTO phpbb3_posts (forum_id, poster_id, icon_id, poster_ip, post_time, post_visibility, enable_bbcode, enable_smilies, enable_magic_url, enable_sig, post_username, post_subject, post_text, post_checksum, post_attachment, bbcode_bitfield, bbcode_uid, post_postcount, post_edit_locked, topic_id) VALUES (48, 5201, 0, '213.39.138.18', 1483342831, 1, 1, 1, 1, 1, '', 'Re: Test emojis', '<r>Test<br/>\n<EMOJI seq=\"2194\">↔️</EMOJI><EMOJI seq=\"1f500\">🔀</EMOJI><EMOJI seq=\"2935\">⤵️</EMOJI></r>', '5a0d2573402f1e7568708d97b2c564a8', 0, '', '33whs5aw', 1, 0, 12491)

BACKTRACE

FILE: (not given by php)
LINE: (not given by php)
CALL: msg_handler()

FILE: [ROOT]/phpbb/db/driver/driver.php
LINE: 999
CALL: trigger_error()

FILE: [ROOT]/phpbb/db/driver/mysqli.php
LINE: 193
CALL: phpbb\db\driver\driver->sql_error()

FILE: [ROOT]/phpbb/db/driver/factory.php
LINE: 329
CALL: phpbb\db\driver\mysqli->sql_query()

FILE: [ROOT]/includes/functions_posting.php
LINE: 1844
CALL: phpbb\db\driver\factory->sql_query()

FILE: [ROOT]/posting.php
LINE: 1414
CALL: submit_post()