Is the input different when there are many options vs one option? The UI difference may just be the “select multiple values” vs the “select one value” input type
it looks like you can use the “Chosen” callback in “Elements/EditCustomFieldSelect” to set “$use_chosen” to 0 at all times or add a new check that occurs after the existing one:
my $use_chosen = $CustomField->Values->Count >= 10 ? 1 : 0;
out of curiosity does a shift+ctr+r page refresh fix the issue? Maybe the browser has some cached CSS/JS that messes with the RT CSS/JS
Both solutions didn’t work.
I edited directly in /opt/rt4/share/html/Elements/EditCustomFieldSelect on the test system, I know, this is not the recommended way. Mason cache has been cleaned and apache restarted.
Refreshing and different browser had no effect either.