Confluence-Jira link shows cyrillic symbols as "?????"

[admin_tt]

Greetings! 
So, I'm trying to link a Confluence page to a Jira issue. The page's title contains some cyrillic symbols.
Here's a screenshot of the title: 

And in Jira's UI it looks like this: 


Am I missing something? It happens only when I'm trying to link a page to an issue. 

[admin_tt · Accepted solution]

Found it! It was my nginx-config all along. 
My proxy-pass looked like this: "proxy_pass http://127.0.0.1:8080/"
while it should look like this: "proxy_pass http://127.0.0.1:8080"

Case's closed, boys. 

[Krisztian Kovacs]

Hi @admin_tt,

is it possible that the default encoding of Confluence and/or Jira is not set to UTF-8?

I'd also look at the database encoding.

Let me know if this helps at all.

[admin_tt]

Hi! 
Yeah, that was my first idea too, but it looks like the default encoding of both instances is fine. 
MySQL default settings - UTF-8
Tomcat connector - UTF-8
Jira/Confluence - UTF-8.