Changing ticket's issue summary causes the ticket unsearchable

[swippy]

Prerequisites

• Can you reproduce the problem in a fresh installation of the "develop" branch?
• Do you have any errors in the PHP error log, or javascript console?
• Did you check the osTicket forums?
• Did you perform a cursory search to see if your bug or enhancement is already reported?

For more information on how to write a good bug report

Description

Editing the ticket (Issue Summary) causes searching the ticket using the new subject (issue summary) to be failed (or unsearchable).

Steps to Reproduce

1. As a client, create a new ticket with any Issue Summary (i.e. "Charging failure")
2. Open the ticket, click the Edit button, change the Issue Summary field (i.e. "Purchase failure"), then click the Update button

3. Now go to the Tickets, type the keyword using the new subject (i.e. "Purchase"), then click the Search button.
   It will show no results ("Your query did not match any records") and its header remains unchanged ("Showing 1 - x of x Open Tickets"). So, we have 2 issues here.

4. If we typed the keyword using the previous subject (before the editing, i.e. "Charging"), then it will show a result (the ticket that has "Purchase failure" as its subject). Again, its header is also unchanged ("Showing 1 - x of x Open Tickets").

Expected behavior:
When we changed the issue summary (or issue subject), we should be able to search the ticket using the keyword of the new issue summary/subject, not the old one (when the first time the user created the ticket).
And, the header information ("Showing 1 - x of x Open Tickets") should updated accordingly.

Actual behavior:
It failed to search the ticket using the keyword of any substring of the edited issue summary, but it returns the search result if we use the keyword of any substring from the previous issue summary (precisely, the original issue summary).
And, the header is always unchanged ("Showing 1 - x of x Open Tickets") upon the search or when we reset the search.

Versions

Admin panel -> Dashboard -> Information which also additionally gives you information about your server.

Also, please include the OS and what version of the OS you're running. As well as your browser and browser version.

Using osTicket docker (can be found in here: https://github.com/devinsolutions/docker-osticket), running on CentOS Linux release 7.9.2009 (Core) host.
Browser used is Firefox version 120.0.1 (64-bit).