From 752133b01cc7cb0a10a3b4e06d5d097b27c6a6e8 Mon Sep 17 00:00:00 2001
From: "nicolas.dorier" <nicolas.dorier@gmail.com>
Date: Sun, 18 Feb 2018 20:37:42 +0900
Subject: [PATCH] fix bug

---
 BTCPayServer/HostedServices/InvoiceNotificationManager.cs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/BTCPayServer/HostedServices/InvoiceNotificationManager.cs b/BTCPayServer/HostedServices/InvoiceNotificationManager.cs
index 084359964..83500089b 100644
--- a/BTCPayServer/HostedServices/InvoiceNotificationManager.cs
+++ b/BTCPayServer/HostedServices/InvoiceNotificationManager.cs
@@ -281,7 +281,9 @@ namespace BTCPayServer.HostedServices
                 {
                     lock (_SendingRequestsByInvoiceId)
                     {
-                        _SendingRequestsByInvoiceId.Remove(id);
+                        _SendingRequestsByInvoiceId.TryGetValue(id, out var executing2);
+                        if(executing2 == sending)
+                            _SendingRequestsByInvoiceId.Remove(id);
                     }
                 }, TaskScheduler.Default);
             }