qTranslate-XT issue: AM/PM

Hi,

I’m using WP5.5.3 with qTranslate-XT 3.5.4.
AM/PM cannot be shown neatly in Japanese. AM or PM characters are displayed as ‘????’
JP: https://gyazo.com/0c416739fd0132ae746275cff1ecf751
EN: https://gyazo.com/73f66c97412052301136e26c2a1dfeff
English is fine.
Besides, WP 5.4.4 with qTranslate-XT is no issue.

I upgraded the qTranslate-XT to 3.9.1
The problem is still there.

I’d appreciate it if you help me.
Thank you,