OK, so I can reproduce this problem. I debugged it all the way through the various Q2A layers and strangely enough it seems like a bug in PHP's own mysql_query(...) function - for some reason that UTF-8 byte sequence 0xF0 0xA5 0x9A 0x83 cuts off the query. I'd be interested if you could confirm that - in the meantime your best bet for this specific case is to modify the database contents manually to put in the character, after which it should be displayed correctly.
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April 20, 2021: Q2A 1.8.6 released!