This part from https://www.bestpractical.com/docs/rt/4.2/RT_Config.html https://www.bestpractical.com/docs/rt/4.2/RT_Config.html may explain it:
If set to 1, the owner drop-downs for ticket update/modify and the query builder are replaced by text fields that autocomplete. This can alleviate the sometimes huge owner list for installations where many users have the OwnTicket right.
Autocompleter is automatically turned on if list contains more than 50 users, but penalty of executing potentially slow query is still paid.
Drop down doesn’t show unprivileged users. If your setup allows unprivileged to own ticket then you have to enable autocompleting.
Aaron> On Jun 17, 2015, at 12:46 PM, Boris Epstein email@example.com wrote:
For some reason, at some point in a not so distant past, the form where you can assign a newly created ticket to a user has changed from a pull-down list to a form where you can type it in (with auto-fill but still). Has anybody seen that? Does anybody know why this is happening?
Thanks in advance for any and all help.