[PickerInput]: Search items can't be checked when LazyDS initially empty

[cpoftea]

Prerequisites

• [x] I am running the latest version
• [x] I checked the documentation and found no answer
• [x] I checked to make sure that this issue has not already been filed

Description

If LazyDataSource receives empty list items from initial request, list items returned from request with search can't be checked.

Steps to Reproduce

1. Open Sandbox
2. Click "Initially empty LazyDS" picker
3. Type any search term until "I should be selectable" search item appears
4. Click "I should be selectable" item

Actual result

"I should be selectable" item is not checked

Expected result

"I should be selectable" item checked

Additional info

If LazyDataSource receives at least one item from initial request, list items returned from request with search can be checked. Same steps can be applied to "Initially one item LazyDS" picker at same Sandbox

Environment

• UUI version: 5.10.2
• Browser name: FF 131.0.3
• Operating System: MacOS 15.0.1