ui5 issue table binding working randomly under 1.71

Question

Under v1.71, my code is working randomly (litteraly, sometimes the table displays the items correctly sometimes it doesn't) although it is perfectly working under v1.6+.

I'm working under 1.17.21

My default model is two-way binded.

The table is created in the xml view :

<Table id="tableId" items="{Items}" delete=".onDeleteRow" mode="Delete" noDataText="{i18n>noItems}">
                        <headerToolbar>
                            <OverflowToolbar>
                                <Title text="{i18n>addedItems}" level="H3"/>
                                <ToolbarSpacer></ToolbarSpacer>
                                <Button icon="sap-icon://add" press=".onAddItemPress" tooltip="{i18n>addButtonTooltip}"/>
                            </OverflowToolbar>
                        </headerToolbar>
                        <columns>
                            <Column hAlign="Center" minScreenWidth="Small" demandPopin="true" popinDisplay="Inline">
                                <header>
                                    <Label text="{/#PRItem/ShortText/@sap:label}"/>
                                </header>
                            </Column>
                            <Column hAlign="Center" minScreenWidth="Small" demandPopin="true" popinDisplay="Inline">
                                <header>
                                    <Label text="{/#PRItem/Quantity/@sap:label}"/>
                                </header>
                            </Column>
                            <Column hAlign="Center" minScreenWidth="Small" demandPopin="true" popinDisplay="Inline">
                                <header>
                                    <Label text="{/#PRItem/PriceUnit/@sap:label}"/>
                                </header>
                            </Column>
                            <Column hAlign="Center" minScreenWidth="Small" demandPopin="true" popinDisplay="Inline">
                                <header>
                                    <Label text="{/#PRItem/Price/@sap:label}"/>
                                </header>
                            </Column>
                            <Column id="editIconColumn" hAlign="End" width="50px"/>
                        </columns>
                        <items>
                            <ColumnListItem>
                                <cells>
                                    <Text text="{ShortText}"/>
                                    <Text text="{Quantity}"/>
                                    <Text text="{Quantity}"/>
                                    <Text text="{parts [path:'Price', path:'Quantity', path:'PriceUnit'], formatter: this.formatter.setSousTotal}"/>
                                    <core:Icon src="sap-icon://edit-outside" press=".onEditIconPress" tooltip="{i18n>editIconTooltip}"/>
                                </cells>
                            </ColumnListItem>
                        </items>
                    </Table>

And I bind the view context and items as follows:

_createPurchaseRequest: function () {
        var oContext = this.getOwnerComponent().getModel().createEntry("/PRHeaderSet");

        this.getView().setBindingContext(oContext);
        this._getDefaultValues();
},

onAddItemPress: function (oEvent) {
        var oView = this.getView(),
            // oModel = this.getOwnerComponent().getModel(),
            oModel = this.getModel(),
            oHdrCtx = oView.getElementBinding() ? oView.getElementBinding().getBoundContext() : oView.getBindingContext(),
            oItemContext = oModel.createEntry("/PRItemSet"),
            aAllItems = this._getArrayOrDefault(oModel.getProperty(oHdrCtx.getPath() + "/Items"));

        aAllItems.push(oItemContext.getPath().substring(1));
        oModel.setProperty("Items", aAllItems, oHdrCtx);
        this.getOwnerComponent().getModel("createViewModel").setProperty("/mode", "creationMode");
        oModel.setProperty("Quantity", "7", oItemContext);
     },

    _getArrayOrDefault: function (e) {
        return e ? Array.from(e) : [];
    },

The aggregation("items") is correctly binded but sometimes its properties aKeys and aAllKeys are empty so the table doesn't display anything.

When working:

Not working (after trying to add an item or more)

A comparison between a working case (left) and a non working one (right) :

Can anyone see the isse?

Answer 1

Well I don't really understand but I managed to resolve my problem by giving more time to the framework to make two independents operations which are setting the context to the view and get the defaults values. I mean independents here because I don't need those default values to set the context et I could get those values without setting the former.