Do not update previous value if there is an expected value when repor…

…ting attributes

- Fix the logs for the case when we do not report the attribute

src/darwin/Framework/CHIP/MTRDevice.mm

@@ -2343,24 +2343,24 @@ - (NSArray *)_getAttributesToReportWithReportedValues:(NSArray<NSDictionary<NSSt
 #endif
             }
 
-            // if expected values exists, purge and update read cache
+            // If expected values exists, do not report the attribute. On expiry of the expected value interval,
+            // the correct value will be reported anyways.
             NSArray * expectedValue = _expectedValueCache[attributePath];
             if (expectedValue) {
-                previousValue = expectedValue[MTRDeviceExpectedValueFieldValueIndex];
-                _readCache[attributePath] = attributeDataValue;
                 shouldReportAttribute = NO;
             } else if (readCacheValueChanged) {
                 // otherwise compare and update read cache
                 previousValue = _readCache[attributePath];
-                _readCache[attributePath] = attributeDataValue;
                 shouldReportAttribute = YES;
             }
+            _readCache[attributePath] = attributeDataValue;
 
             if (!shouldReportAttribute) {
                 if (expectedValue) {
-                    MTR_LOG_INFO("%@ report %@ value filtered - same as expected values", self, attributePath);
-                } else {
-                    MTR_LOG_INFO("%@ report %@ value filtered - same values as cache", self, attributePath);
+                    MTR_LOG_INFO("%@ report %@ value filtered - new expected value present. Do not report old value", self, attributePath);
+                } else
+                {
+                    MTR_LOG_INFO("%@ report %@ value filtered - same as read cache", self, attributePath);
                 }
             }