diff --git a/Core/UDStringExtension.swift b/Core/UDStringExtension.swift
index bae15e6..70178b1 100644
--- a/Core/UDStringExtension.swift
+++ b/Core/UDStringExtension.swift
@@ -57,7 +57,7 @@ extension String {
     }
     
     func udIsValidEmail() -> Bool {
-        let emailRegex = "[A-Z0-9a-z]([A-Z0-9a-z._%+-]{0,30}[A-Z0-9a-z_])?" + "@" + "([A-Z0-9a-z]([A-Z0-9a-z-]{0,30}[A-Z0-9a-z])?\\.){1,5}" + "[A-Za-z]{2,8}"
+        let emailRegex = "[A-Z0-9a-z]([A-Z0-9a-z._%+-]{0,64}[A-Z0-9a-z_])?" + "@" + "([A-Z0-9a-z]([A-Z0-9a-z-]{0,255}[A-Z0-9a-z])?\\.){1,5}" + "[A-Za-z]{2,8}"
         let emailTest = NSPredicate(format:"SELF MATCHES[c] %@", emailRegex)
         return emailTest.evaluate(with: self) && !self.udIsHtml()
     }
diff --git a/Core/UseDeskSDKHelp.swift b/Core/UseDeskSDKHelp.swift
index 09e6d14..49d648d 100755
--- a/Core/UseDeskSDKHelp.swift
+++ b/Core/UseDeskSDKHelp.swift
@@ -10,7 +10,7 @@ class UseDeskSDKHelp {
         let payload: [String : Any] = [
             "sdk" : "iOS",
             "type" : "sdk",
-            "version" : "3.4.11",
+            "version" : "3.4.12",
             "message_limit" : countMessagesOnInit,
             "userData" : getUserParameters()
         ] 
diff --git a/Example/UseDesk.xcodeproj/project.pbxproj b/Example/UseDesk.xcodeproj/project.pbxproj
index cdf7f7f..19eb15f 100644
--- a/Example/UseDesk.xcodeproj/project.pbxproj
+++ b/Example/UseDesk.xcodeproj/project.pbxproj
@@ -589,7 +589,7 @@
 				INFOPLIST_FILE = "UseDesk/UseDesk-Info.plist";
 				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
-				MARKETING_VERSION = 3.4.11;
+				MARKETING_VERSION = 3.4.12;
 				MODULE_NAME = ExampleApp;
 				ONLY_ACTIVE_ARCH = YES;
 				PRODUCT_BUNDLE_IDENTIFIER = UseDeskExampleSDK.ru;
@@ -622,7 +622,7 @@
 				INFOPLIST_FILE = "UseDesk/UseDesk-Info.plist";
 				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
-				MARKETING_VERSION = 3.4.11;
+				MARKETING_VERSION = 3.4.12;
 				MODULE_NAME = ExampleApp;
 				ONLY_ACTIVE_ARCH = YES;
 				PRODUCT_BUNDLE_IDENTIFIER = UseDeskExampleSDK.ru;
diff --git a/Example/UseDesk/UDStartViewController/UDStartViewController.swift b/Example/UseDesk/UDStartViewController/UDStartViewController.swift
index cf811cf..241328e 100755
--- a/Example/UseDesk/UDStartViewController/UDStartViewController.swift
+++ b/Example/UseDesk/UDStartViewController/UDStartViewController.swift
@@ -179,8 +179,8 @@ class UDStartViewController: UIViewController, UITextFieldDelegate, TabBarContro
     @IBAction func startChatButton(_ sender: Any) {
         guard isCanStartSDK else {
             return
-            
         }
+        IQKeyboardManager.shared.enable = false
         isCanStartSDK = false
         usedesk.presentationCompletionBlock = { [weak self] in
             self?.isCanStartSDK = true
@@ -217,6 +217,7 @@ class UDStartViewController: UIViewController, UITextFieldDelegate, TabBarContro
 
         usedesk.presentationCompletionBlock = {
             print("close SDK")
+            IQKeyboardManager.shared.enable = true
         }
     }
     
@@ -240,6 +241,7 @@ class UDStartViewController: UIViewController, UITextFieldDelegate, TabBarContro
             }
             self.isCanStartSDK = true
         }, errorStatus: { [weak self] _, error in
+            IQKeyboardManager.shared.enable = true
             self?.showError(error: error)
             self?.isCanStartSDK = true
         })
@@ -263,6 +265,7 @@ class UDStartViewController: UIViewController, UITextFieldDelegate, TabBarContro
             }
             self.isCanStartSDK = true
         }, errorStatus: { [weak self] _, error in
+            IQKeyboardManager.shared.enable = true
             self?.showError(error: error)
             self?.isCanStartSDK = true
         })
diff --git a/UseDesk/Classes/UDListBaseKnowledgeVC.swift b/UseDesk/Classes/UDListBaseKnowledgeVC.swift
index 0d3ff29..88b01b8 100644
--- a/UseDesk/Classes/UDListBaseKnowledgeVC.swift
+++ b/UseDesk/Classes/UDListBaseKnowledgeVC.swift
@@ -292,7 +292,9 @@ class UDListBaseKnowledgeVC: UDBaseKnowledgeVC, UITableViewDelegate, UITableView
             self.searchViewTopC.isActive = true
             self.viewForTableTopCForSuperView.isActive = false
             self.viewForTableTopC.isActive = true
-            self.backButton.alpha = 1
+            if (self.usedesk?.model.isPresentDefaultControllers ?? true) {
+                self.backButton.alpha = 1
+            }
             self.viewForTable.alpha = 1
             self.searchSeparatorView.alpha = 0
             self.searchNotFoundLabel.alpha = 0
diff --git a/UseDesk/Classes/UDMessagesView.swift b/UseDesk/Classes/UDMessagesView.swift
index c12b5e6..39acb8c 100755
--- a/UseDesk/Classes/UDMessagesView.swift
+++ b/UseDesk/Classes/UDMessagesView.swift
@@ -158,8 +158,11 @@ class UDMessagesView: UIViewController, UITextViewDelegate, UIImagePickerControl
         
         configurationStyle = usedesk?.configurationStyle ?? ConfigurationStyle()
         
-        loader.alpha = 1
-        loader.startAnimating()
+        
+        loader.alpha = isFromBase ? 0 : 1
+        if !isFromBase {
+            loader.startAnimating()
+        }
         
         tableNode.backgroundColor = configurationStyle.chatStyle.backgroundColor
         self.view.backgroundColor = tableNode.backgroundColor
diff --git a/UseDesk/Classes/UDUIManager.swift b/UseDesk/Classes/UDUIManager.swift
index 31957c1..c93cf93 100644
--- a/UseDesk/Classes/UDUIManager.swift
+++ b/UseDesk/Classes/UDUIManager.swift
@@ -219,6 +219,7 @@ class UDUIManager: UDUIProtocole {
         if dialogflowVC == nil {
             dialogflowVC = DialogflowView()
             dialogflowVC?.usedesk = usedesk
+            dialogflowVC?.updateChat()
         }
         dialogflowVC?.view.layoutSubviews()
         return dialogflowVC
diff --git a/UseDesk_SDK_Swift.podspec b/UseDesk_SDK_Swift.podspec
index e59436e..08a39a0 100755
--- a/UseDesk_SDK_Swift.podspec
+++ b/UseDesk_SDK_Swift.podspec
@@ -1,7 +1,7 @@
 Pod::Spec.new do |s|
 
 	s.name             = 'UseDesk_SDK_Swift'
-	s.version          = '3.4.11'
+	s.version          = '3.4.12'
 	s.summary          = 'A short description of UseDesk.'
 
 	s.homepage         = 'https://github.com/usedesk/UseDeskSwift'