Non-imported extensions are excluded when shadowed by members or something

idea/idea-completion/testData/basic/multifile/PreferMemberToExtension/PreferMemberToExtension.dependency.kt

@@ -0,0 +1,3 @@
+package dependency
+
+fun Any.xxx(): Int = 1

idea/idea-completion/testData/basic/multifile/PreferMemberToExtension/PreferMemberToExtension.kt

@@ -0,0 +1,14 @@
+package ppp
+
+import dependency.*
+
+class C {
+    private fun xxx() {}
+
+    fun foo() {
+        xx<caret>
+    }
+}
+
+// EXIST: { lookupString: "xxx", itemText: "xxx", tailText: "()", typeText: "Unit" }
+// NOTHING_ELSE