Steps to reproduce:

1. Create 2 hosts: one named "Zabbix1234server" and one named "1234"
2. Go to the global dashboards and create a new dashboard
3. Add a SVG Graph
4. Type just a wildcard in the host pattern search without any other character (i.e. *)
5. Notice that nothing is returned in the auto-suggest.
6. Type 1234 and notice that it isn't until the full number is typed that values are returned in the auto-suggest. Meaning, 123 and 1 and 12 all return nothing in auto-suggest. You can also type just "1" or "12" or "123" and nothing will be returned in the auto-suggest until you type "1234"

I'm not sure if this impacts the Item Pattern select, but I've recently extended CPatternSelect to create a custom UI widget that allows to specify a name pattern for navigating to other global dashboards and the same issue is present there. Meaning, If I have dashboard names of "Global View", "Zabbix server health" and "137", a single wildcard in the pattern field returns nothing.