Issue Summary

When Japanese Kanji characters are input into Quick Search input area, they are converted to Japanese Hiragana characters on JQL search.
The symptom occurs the string consists of only Kanji. It doesn't occur if the string is mixture of Kanji and other characters, such as Hiragana, Katakana, single byte alpha-numeric characters.

Example:
Quick Search input: 横浜 -> JQL: text ~ "よこはま"
Quick Search input: 横浜で -> JQL: text ~ "横浜で"
Quick Search input: a横浜 -> JQL: text ~ "a横浜"

The symptom occurred on Jira/JSM 11.x, but not 10.x and before.

Steps to Reproduce

1. Setup Jira 11.x, and prepare a client PC/Mac with Japanese IME
2. Input a string "横浜" into Quick Search with Japanese IME (i.e. enable IME, then input "yokohama" and convert it to Kanji)
3. Check the issued JQL

Expected Results

JQL: text ~ "横浜"

Actual Results

JQL: text ~ "よこはま"

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available.