Issue Summary

JSM-Chat, the user can select options on Slack with using select list including options.
But if select list include about 100 options including multibyte characters(Japanese), the user can't see suggestions when input a word on slack.

Steps to Reproduce

1. Create a Jira service management project
2. Create customfield "select list(single choice)"
3. add over 200 Options with multibyte characters.
   1. helpful article: https://community.atlassian.com/forums/Jira-questions/Bulk-Importing-Options-into-quot-Select-List-single-choice-quot/qaq-p/879854
   2. sample options csv: import_selectlist_jp.csv
4. Set JSM-Chat with Slack, and add "request type" including a created "customfield".
5. Reach to Portal and select "request type" and input "あ" or "い" on selectlist field.
6. Reach to Slack and raise a request, and input "あ" or "い" on selectlist field.

Expected Results

The user can see that options are displayed as suggested both on Portal and Slack.

Actual Results

The user can not see suggestions on Slack, but on Portal, suggestions are displayed.

if input number, it shows options as following.

Workaround

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