Unexpected "no data found" at initial state

[pablochud]

After raising the version from 3.3.12 to 3.5.10-dev, the message "No results found " is displayed for a while before the data is downloaded.
This behavior was not in the previous version.

I create example where data is being downloaded after focus element (btw. maybe someone would like this solution)
https://stackblitz.com/edit/ngx-select-ex-issues-100-gk5yxb?file=app%2Fapp.component.ts