getText() issue with relevant logs, test and parts of page object

pageObject.js

function getItems() {
    // returns 5 elements with the given example test
    return browser.getText(selector.items);
}

function getAge() {
    // returns 6 elements with the given example test
    return browser.getText(selector.age);
}

function getAmount() {
    // returns 6 elements with the given example test
    return browser.getText(selector.amount);
}

seleniumLogs

[09:57:01]  COMMAND     GET      "/wd/hub/session/38e4968c6add779344bb75bb5131eb2c/element/0.5538452207450344-15/text"
[09:57:01]  DATA                {}
[09:57:01]  COMMAND     GET      "/wd/hub/session/38e4968c6add779344bb75bb5131eb2c/element/0.5538452207450344-16/text"
[09:57:01]  DATA                {}
[09:57:01]  COMMAND     GET      "/wd/hub/session/38e4968c6add779344bb75bb5131eb2c/element/0.5538452207450344-17/text"
[09:57:01]  DATA                {}
[09:57:01]  COMMAND     GET      "/wd/hub/session/38e4968c6add779344bb75bb5131eb2c/element/0.5538452207450344-18/text"
[09:57:01]  DATA                {}
[09:57:01]  COMMAND     GET      "/wd/hub/session/38e4968c6add779344bb75bb5131eb2c/element/0.5538452207450344-19/text"
[09:57:01]  DATA                {}
[09:57:01]  COMMAND     GET      "/wd/hub/session/38e4968c6add779344bb75bb5131eb2c/element/0.5538452207450344-20/text"
[09:57:01]  DATA                {}
[09:57:01]  COMMAND     GET      "/wd/hub/session/38e4968c6add779344bb75bb5131eb2c/screenshot"
[09:57:01]  DATA                {}
[09:57:01]  RESULT              "€ 2.466"
[09:57:03]  RESULT              "iVBORw0KGgoAAAANSUhEUgAABLAAAAP7CAIAAADEe+C5AAAgAElEQVR4nOzdf3xT1f0/8Bc05ra0aaspVBZmoZ2lVNb4hQ+ZYKtgpdJMfuQzflTFIkiZPyIqZWrcxMI2M5xx08WplMmoOAtln4idqZZBGa3yWfzATIcl1E8r5UNkhWa2DaW9McHvH0nbtE1/QSvFvJ5 ... (135478 more bytes)
[09:57:03]      Saved screenshot: ERROR_chrome_2017-11-23T08-57-01.844Z.png
[09:57:03]  RESULT              "€ 6.203"
[09:57:03]  COMMAND     DELETE   "/wd/hub/session/38e4968c6add779344bb75bb5131eb2c"
[09:57:03]  DATA                {}
------------------------------------------------------------------

test.js

describe('Test set', () => {
  it('Test scenario', () => {
        // Arrange
        action.login('user');

        // Act
        pageObject.openData();

        // Assert
        const actualName = pageObject.getItems();
        const actualPeriods = pageObject.getAge();
        const actualAmounts = pageObject.getAmount();

        assert.deepEqual(actualName, [
            'Name 1',
            'Name 2',
            'Name 3',
            'Name 4',
            'Name 5'
        ]);
        assert.deepEqual(actualPeriods, [
            'period',
            'period',
            'period',
            'period',
            'period',
            'period'
        ]);
        assert.deepEqual(actualAmounts, [
            '€ 1.367',
            '€ 1.367',
            '€ 2.427',
            '€ 2.466',
            '€ 478',
            '€ 6.203'
        ]);
    });
});