Select Dropdown not showing records on Next

[broche]

Clarion 10
NT 9.11

Have a form with a Staff ID select (The ? mark)
When the ? is chosen a popup select list displays staff to select
If the user clicks the next button below the list then no records are displayed.
If they click the Clear button then the records will show.

On my laptop attached to the same site in the cloud it all works just fine?

Thanks in advance for any pointers.

[broche]

Issue seems to have gone away for the users today, might be something local with caching?

Thanks.