FIR: make both ImplicitReceiverStack.get implementations consistent

compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/context/PersistentImplicitReceiverStack.kt

@@ -43,8 +43,14 @@ class PersistentImplicitReceiverStack private constructor(
     }
 
     override operator fun get(name: String?): ImplicitReceiverValue<*>? {
-        if (name == null) return stack.lastOrNull()
-        return indexesPerLabel[Name.identifier(name)].lastOrNull()?.let { stack[it] }
+        if (name == null) {
+            return stack.lastOrNull {
+                it !is ImplicitDispatchReceiverValue || !it.inDelegated
+            }
+        }
+        return indexesPerLabel[Name.identifier(name)].lastOrNull()?.let { stack[it] }?.takeIf {
+            it !is ImplicitDispatchReceiverValue || !it.inDelegated
+        }
     }
 
     override fun lastDispatchReceiver(): ImplicitDispatchReceiverValue? {