diff --git a/model/model-common/src/main/java/com/evolveum/midpoint/model/common/mapping/ValueMetadataComputation.java b/model/model-common/src/main/java/com/evolveum/midpoint/model/common/mapping/ValueMetadataComputation.java
index 33a70ee338b..b735632531f 100644
--- a/model/model-common/src/main/java/com/evolveum/midpoint/model/common/mapping/ValueMetadataComputation.java
+++ b/model/model-common/src/main/java/com/evolveum/midpoint/model/common/mapping/ValueMetadataComputation.java
@@ -85,7 +85,8 @@ private void appendValues(ItemPath outputPath, PrismValueDeltaSetTriple<?> outpu
                 "metadata mapping in " + computer.dataMapping.getMappingContextDescription());
         createSources(builder, mappingBean);
         builder.targetContext(metadataDefinition)
-                .now(computer.dataMapping.now);
+                .now(computer.dataMapping.now)
+                .conditionMaskOld(false); // We are not interested in old values (deltas are irrelevant in metadata mappings).
         return builder.build();
     }
 
@@ -99,7 +100,9 @@ private void createSources(MetadataMappingBuilder<?, ?> builder, MetadataMapping
             //noinspection unchecked
             sourceItem.addAll(getSourceValues(sourcePath));
             //noinspection unchecked
-            builder.additionalSource(new Source<>(sourceItem, null, null, sourceName, sourceDefinition));
+            Source<?, ?> source = new Source<>(sourceItem, null, null, sourceName, sourceDefinition);
+            source.recompute();
+            builder.additionalSource(source);
         }
     }
 
diff --git a/model/model-intest/src/test/resources/metadata/template-regular-user.xml b/model/model-intest/src/test/resources/metadata/template-regular-user.xml
index d7e68ffb134..f9321da8975 100644
--- a/model/model-intest/src/test/resources/metadata/template-regular-user.xml
+++ b/model/model-intest/src/test/resources/metadata/template-regular-user.xml
@@ -34,7 +34,24 @@
                 </source>
                 <expression>
                     <script>
-                        <code>'low'</code> <!-- todo -->
+                        <relativityMode>absolute</relativityMode>
+                        <code>
+                            if (loa == null || loa.isEmpty()) {
+                                rv = null
+                            } else if (loa.contains(null)) {
+                                rv = null
+                            } else if (loa.contains('low')) {
+                                rv = 'low'
+                            } else if (loa.contains('normal')) {
+                                rv = 'normal'
+                            } else if (loa.contains('high')) {
+                                rv = 'high'
+                            } else {
+                                throw new IllegalArgumentException('Unsupported LoA value(s): ' + loa)
+                            }
+                            log.info("### loa = $loa -> $rv")
+                            rv
+                        </code>
                     </script>
                 </expression>
                 <target>