FlexLayout Basis set via CSS doesn't measure/remeasure when content is lazy loaded

Description

Steps to Reproduce

Run SearchPage.xaml. Top 3 are set via xaml. Rest are CSS. Previewer renderers similarly to device.

Basic Information

• Version with issue: 3.6

Reproduction Link

VisualChallenge.zip

<ContentPage.Resources>
        <StyleSheet>
            <![CDATA[
            .interestTile {
                margin-bottom: 10;
                flex-layout-basis: 33%;
            }
            ]]>
        </StyleSheet>
    </ContentPage.Resources>

    <ScrollView>
        <FlexLayout Margin="8"
                    Direction="Row"
                    Wrap="Wrap"
                    JustifyContent="SpaceBetween"
                    AlignContent="Start">
            
            <views:ExploreCategoryTile Headline="AUTOS" FlexLayout.Basis="33%"
                                TopicImage="https://loremflickr.com/320/240/cars?random=1"
                                class="interestTile" />
            <views:ExploreCategoryTile Headline="CAREER ADVICE" FlexLayout.Basis="33%"
                                TopicImage="https://loremflickr.com/320/240/office?random=2"
                                class="interestTile" />
            <views:ExploreCategoryTile Headline="CELEBRITIES" FlexLayout.Basis="33%"
                                TopicImage="https://loremflickr.com/320/240/celebrity?random=3"
                                class="interestTile" />
            <views:ExploreCategoryTile Headline="CREDIT"
                                TopicImage="https://loremflickr.com/320/240/finance?random=4"
                                class="interestTile" />
            <views:ExploreCategoryTile Headline="CRIME"
                                TopicImage="https://loremflickr.com/320/240/police?random=5"
                                class="interestTile" />
            <views:ExploreCategoryTile Headline="ENTERTAINMENT"
                                TopicImage="https://loremflickr.com/320/240/music?random=6"
                                class="interestTile" />
            <views:ExploreCategoryTile Headline="FACT CHECK"
                                TopicImage="https://loremflickr.com/320/240/news?random=7"
                                class="interestTile" />
            <views:ExploreCategoryTile Headline="FOOD &amp; DRINK"
                                TopicImage="https://loremflickr.com/320/240/food?random=8"
                                class="interestTile" />
            <views:ExploreCategoryTile Headline="GOLF"
                                TopicImage="https://loremflickr.com/320/240/golf?random=9"
                                class="interestTile" />
            <views:ExploreCategoryTile Headline="MONEY"
                                TopicImage="https://loremflickr.com/320/240/flag?random=10"
                                class="interestTile" />
            <views:ExploreCategoryTile Headline="SPORTS"
                                TopicImage="https://loremflickr.com/320/240/flag?random=11"
                                class="interestTile" />
            <views:ExploreCategoryTile Headline="NEWS VIDEO"
                                TopicImage="https://loremflickr.com/320/240/flag?random=12"
                                class="interestTile" />
            <views:ExploreCategoryTile Headline="AUTOS"
                                TopicImage="https://loremflickr.com/320/240/flag?random=13"
                                class="interestTile" />
            <views:ExploreCategoryTile Headline="NHL"
                                TopicImage="https://loremflickr.com/320/240/flag?random=14"
                                class="interestTile" />
            <views:ExploreCategoryTile Headline="TECHNOLOGY"
                                TopicImage="https://loremflickr.com/320/240/flag?random=15"
                                class="interestTile" />

            
        </FlexLayout>
    </ScrollView>