Why the SingleSelect component is not retaining selected value after tabbing out and reselecting it?

Summary:

The Single Select component is not consistently storing the selected value when navigating between fields.
Component: Single Select
Backend: SDP-based data fetched via Fusion API from Fusion tables

Content (please ensure you mask any confidential information):

Observed Behavior:

1. As the user types in the dropdown, matching results are displayed based on the input.
2. Upon selecting a value, it is correctly stored in the field.
3. When the user navigates away using the Tab key, the keyboard focus moves to the next field as expected.
4. However, when the user manually returns to the Single Select field, the previously selected value disappears