[ZBX-10540] Japanese characters are changed to ?????? in "Trigger Description" have been created by the discovery - ZABBIX SUPPORT

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Japanese characters are changed to ?????? in "Trigger Description" that have been created by the discovery. (fig1.png)

In MySQL, Japanese characters are changed to ??????. ("trigger_table_mysql.txt" and "fig2.png RED BOX")

If edit template item , The "??????" are changed to normal (linked change. and fig1.png BLUE BOX)

If delete the item and re-discovery, Reproduce any number of times in all of the items.

If restart the zabbix-server (systemctl restart zabbix-server) , then operating normally.

But It relapse after a few weeks.

It looks like ~~ZBX-9307~~

is duplicated by

ZBX-10665 Cyrillic characters replaced by question marks

ZBX-10857 when I use vsphere:https://ip/sdk template,The Virtual mechines' chinese names are wrong

ZBX-11089 zabbix v 3.0.1 email bad utf-8

ZBX-10707 Double UTF-8 coding for Discovered Services

ZBX-10929 Can't use unicode in LLD JSON string