IDEA-86242 Code completion do not suggest members of known common supertype

java/java-tests/testData/codeInsight/completion/normal/InstanceOfDisjunction.java

@@ -0,0 +1,11 @@
+import java.math.BigInteger;
+import java.util.function.Function;
+
+class Test {
+  long test(Object obj) {
+    if (obj instanceof Integer || obj instanceof Long) {
+      obj.long<caret>
+    }
+    return -1;
+  }
+}