SAPUI5: Wrong Deviation Calculation for KPI/DataPoint

[tobias_grimm_ksg]

I have an SAPUI5 application that is based on an FIORI Elements Overview Page template.
One of my cards on the OVP shows an KPI header with the following values:

• KPI Value: Average Delivery Delay (in days) for the past 90 days
• Target Value: Average Delivery Delay (in days) for the past 365 days
• Automatically calculated deviation of the values  in %

We recently upgraded our system from S/4 2020 SP3 to S/4 2023 SP1. This included updating SAPUI5 libraries from 1.84.6 to 1.120.0. After the upgrade, the deviation calculation shows a wrong value. Before it worked as expected.

                
<Annotation Term="UI.DataPoint" Qualifier="DataPointDurchschnittLieferverzug">
	<Record Type="UI.DataPointType">
		<PropertyValue Property="Title" String="{@i18n>datapoint_title_durchschnitt_lieferverzug}" />
		<PropertyValue Property="Description" String="{@i18n>datapoint_title_durchschnitt_lieferverzug}" />
		<PropertyValue Property="Value" Path="AvgDelivToCmtdDelivDelayInDays" />
		<PropertyValue Property="CriticalityCalculation">
			<Record Type="UI.CriticalityCalculationType">
				<PropertyValue Property="ImprovementDirection" EnumMember="UI.ImprovementDirectionType/Minimize" />
				<PropertyValue Property="ToleranceRangeHighValue" Decimal="3" />
				<PropertyValue Property="DeviationRangeHighValue" Decimal="5" />
			</Record>
		</PropertyValue>
		<PropertyValue Property="TrendCalculation">
			<Record Type="UI.TrendCalculationType">
				<PropertyValue Property="ReferenceValue" Path="AvgDlvToCmtdDlvDelayPast365Day" />
				<PropertyValue Property="UpDifference" Decimal="1" />
				<PropertyValue Property="StrongUpDifference" Decimal="2" />
				<PropertyValue Property="DownDifference" Decimal="-1" />
				<PropertyValue Property="StrongDownDifference" Decimal="-2" />
			</Record>
		</PropertyValue>
		<PropertyValue Property="ValueFormat">
			<Record Type="UI.NumberFormat">
				<PropertyValue Property="NumberOfFractionalDigits" Int="1" />
			</Record>
		</PropertyValue>
	</Record>
</Annotation>

[tobias_grimm_ksg · Accepted solution]

After discussing the issue with one of the developers of the framework, a fix was released in the latest patch level 28 (SAPUI5 version 1.120.28). The deviation calculation now behaves as expected again.

See this note to update to a newer patch level: https://me.sap.com/notes/3155948