Fixes according to review

Author: jguz-pubnub

Sources/Miscellaneous/ChatAdapter.swift

@@ -26,11 +26,21 @@ class ChatAdapter {
     }
   }
 
-  static func associate(chat: ChatImpl, with kotlinChat: PubNubChat.ChatImpl) {
-    queue.sync {
+static func associate(chat: ChatImpl, with kotlinChat: PubNubChat.ChatImpl) {
+  queue.sync {
+    associations.removeAll {
+       $0.isEmpty()
+    }
+    if let existing = associations.first(where: {
+      !$0.isEmpty() && ($0.chat === chat || $0.kotlinChat === kotlinChat)
+    }) {
+      existing._chat = chat
+      existing._kotlinChat = kotlinChat
+    } else {
       associations.append(.init(chat: chat, kotlinChat: kotlinChat))
     }
   }
+}
 
   static func clean() {
     queue.sync {
@@ -46,8 +56,8 @@ class ChatAdapter {
     // swiftlint:disable:next force_unwrapping
     var kotlinChat: PubNubChat.ChatImpl { _kotlinChat! }
 
-    private weak var _chat: ChatImpl?
-    private weak var _kotlinChat: PubNubChat.ChatImpl?
+    weak var _chat: ChatImpl?
+    weak var _kotlinChat: PubNubChat.ChatImpl?
 
     init(chat: ChatImpl, kotlinChat: PubNubChat.ChatImpl) {
       _chat = chat