Have you checked these first?
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Help us help you: include your environment details. We've made this easy for you. Use the Copy System Info button in Admin Panel › osAwesome › Diagnostics, then paste below.
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osTicket Version :v1.16.3 (e148727) — Up to date
Web Server Software : Microsoft-IIS/10.0
MySQL Version : 5.5.45
PHP Version : 8.0.0
osTicket Awesome : osTicket-1.16.3-Awesome-101
When creating a ticket, the [Assign To] and other highlight fields below would need the type ahead feature or the classic list box feature, i.e. when type "b" in [Assign To] would jump to option "Betty Page" in below screen capture for easier input as some option list would be long and hard to select by scrolling, the original osTicket version uses the classic selection list and works fine.
Any suggestions for a Mod. or fixes in coming release would be much appreciate, thank you.

Hi @itsd_support,
Good point.
Open osta/inc/staff-foot.html and add a new line between Lines 44 and 45 and insert the following:
$('#assignId').select2();
Or wait for the next release!
I honestly have no idea!
It's a great question, but once again I have to recommend that you post it in the osTicket Forum where you are far more likely to get good responses.
Good luck!
Honestly, I never get useful answers on the osTicket Forum, so I need to find by myself.