Offline chat form fails to show "Offline Success Message"

[billynoah]

Description:

The setting "Offline Success Message" / Livechat_offline_success_message seems to have no effect. After filling offline form it simply clears itself.

Steps to reproduce:

1. Visit a site with livechat widget while omnichannel is offline
2. Open a chat and submit offline form

Expected behavior:

Widget should display "Offline Success Message" / Livechat_offline_success_message

Actual behavior:

Form is cleared and no success message is displayed.

Server Setup Information:

Version of Rocket.Chat Server: 3.13.2
Operating System: Ubuntu 20.04
Deployment Method: Snap
Number of Running Instances: 1
NodeJS Version: v12.21.0
MongoDB Version: 3.6.14 / wiredTiger (oplog Enabled)

Client Setup Information

Desktop App or Browser Version: Firefox 78.8.0esr, Chrome Version 90.0.4430.85 (Official Build) (x86_64)
Operating System: OSX 10.11