Question Go to the background with the home button while watching an ad

This is the process I am testing.
1. Move to the background with the Home button while watching advertisements.
2. Go back to the app
3. The ad is skipped

When an advertisement is skipped by the above process, the user can't get rewarded.
However, only the first time a failure response is received and the function registered as

OnFailedShow

is executed. 2nd and 3rd are not executed.

Can I get a one time failure response or is it taking a long time?

I use the same code as written in Mediation - Code Generator.

Code (CSharp):

1. using System;
2. using Unity.Services.Core;
3. using Unity.Services.Mediation;
4. using UnityEngine;
5.  
6. namespace Unity.Example
7. {
8.     public class InterstitialAdExample
9.     {
10.         IInterstitialAd ad;
11.         string adUnitId = "/*ad unit id*/";
12.         string gameId = "/*android game id*/";
13.  
14.         public async void InitServices()
15.         {
16.             try
17.             {
18.                 InitializationOptions initializationOptions = new InitializationOptions();
19.                 initializationOptions.SetGameId(gameId);
20.                 await UnityServices.InitializeAsync(initializationOptions);
21.  
22.                 InitializationComplete();
23.             }
24.             catch (Exception e)
25.             {
26.                 InitializationFailed(e);
27.             }
28.         }
29.  
30.         public void SetupAd()
31.         {
32.             //Create
33.             ad = MediationService.Instance.CreateInterstitialAd(adUnitId);
34.  
35.             //Subscribe to events
36.             ad.OnLoaded += AdLoaded;
37.             ad.OnFailedLoad += AdFailedLoad;
38.  
39.             ad.OnShowed += AdShown;
40.             ad.OnFailedShow += AdFailedShow;
41.             ad.OnClosed += AdClosed;
42.             ad.OnClicked += AdClicked;
43.        
44.             // Impression Event
45.             MediationService.Instance.ImpressionEventPublisher.OnImpression += ImpressionEvent;
46.         }
47.  
48.         public void ShowAd()
49.         {
50.             if (ad.AdState == AdState.Loaded)
51.             {
52.                 ad.Show();
53.             }
54.         }
55.  
56.         void InitializationComplete()
57.         {
58.             SetupAd();
59.             ad.Load();
60.         }
61.  
62.         void InitializationFailed(Exception e)
63.         {
64.             Debug.Log("Initialization Failed: " + e.Message);
65.         }
66.  
67.         void AdLoaded(object sender, EventArgs args)
68.         {
69.             Debug.Log("Ad loaded");
70.         }
71.  
72.         void AdFailedLoad(object sender, LoadErrorEventArgs args)
73.         {
74.             Debug.Log("Failed to load ad");
75.             Debug.Log(args.Message);
76.         }
77.  
78.         void AdShown(object sender, EventArgs args)
79.         {
80.             Debug.Log("Ad shown!");
81.         }
82.  
83.         void AdClosed(object sender, EventArgs e)
84.         {
85.             // Pre-load the next ad
86.             ad.Load();
87.             Debug.Log("Ad has closed");
88.             // Execute logic after an ad has been closed.
89.         }
90.  
91.         void AdClicked(object sender, EventArgs e)
92.         {
93.             Debug.Log("Ad has been clicked");
94.             // Execute logic after an ad has been clicked.
95.         }
96.  
97.         void AdFailedShow(object sender, ShowErrorEventArgs args)
98.         {
99.             Debug.Log(args.Message);
100.         }
101.  
102.         void ImpressionEvent(object sender, ImpressionEventArgs args)
103.         {
104.             var impressionData = args.ImpressionData != null ? JsonUtility.ToJson(args.ImpressionData, true) : "null";
105.             Debug.Log("Impression event from ad unit id " + args.AdUnitId + " " + impressionData);
106.         }
107.    
108.     }
109. }

 

1. I'm using LD player, not a real device. The device set in LD Player is Galaxy Note9. OS is Android 7.1.2.
2. I'm using 0.4.0-preview.1 version.
3. When I posted the question, only Unity Ads were registered in Ad Source. So I checked that it happening in Unity Ads. But I haven't checked yet to see it in other ads. I recently added AppLovin and will be testing it tomorrow. If it also occurs in AppLovin, I will add an additional comment.

 

The same happens in AppLovin.

 

I've confirmed that it doesn't happen on iPhones among real devices.
I'm trying to check my Android device, but do I need to send the device log instead of the Unity Debug Log?
If yes, how can I check the device log?