Dropdown with Lazy Loading: The item list contains duplicate entries

[JaneSjs]

T20690 - Dropdown with lazy loading duplicates choices
https://surveyjs.answerdesk.io/internal/ticket/details/T20690

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To reproduce the issue, modify the skip (0) and take (5) parameters of the Lazy Loading function: View Demo.

survey.onChoicesLazyLoad.add((_, options) => {
      if (options.question.getType() === "dropdown" && options.question.name === "country") {
        const url = `https://surveyjs.io/api/CountriesExamplePagination?skip=0&take=5&filter=${options.filter}`;
        sendRequest(url, (data) => { options.setItems(data.countries, data.total); });
      }
});

Start entering a search criteria. You can see that an item list is duplicated.

2024-11-27_16-34-40.mp4