do not send push notifications to device that intiated the cipher create/update/delete since that device should arleady be handling the action after API response.

src/Core/CurrentContext.cs

@@ -9,5 +9,6 @@ namespace Bit.Core
     public class CurrentContext
     {
         public virtual User User { get; set; }
+        public virtual string DeviceIdentifier { get; set; }
     }
 }

src/Core/Identity/JwtBearerEventImplementations.cs

@@ -9,6 +9,7 @@ using Microsoft.AspNetCore.Http.Authentication;
 using Microsoft.IdentityModel.Tokens;
 using Microsoft.AspNetCore.Identity;
 using Bit.Core.Domains;
+using System.Linq;
 
 namespace Bit.Core.Identity
 {
@@ -37,6 +38,11 @@ namespace Bit.Core.Identity
             // register the current context user
             var currentContext = context.HttpContext.RequestServices.GetRequiredService<CurrentContext>();
             currentContext.User = user;
+            var deviceIdentifierClaim = context.Ticket.Principal.Claims.SingleOrDefault(c => c.Type == "DeviceIdentifier");
+            if(deviceIdentifierClaim != null)
+            {
+                currentContext.DeviceIdentifier = deviceIdentifierClaim.Value;
+            }
         }
 
         public static Task AuthenticationFailedAsync(AuthenticationFailedContext context)

src/Core/Identity/JwtBearerSignInManager.cs

@@ -68,7 +68,7 @@ namespace Bit.Core.Identity
 
             if(await UserManager.CheckPasswordAsync(user, password))
             {
-                var result = await SignInOrTwoFactorAsync(user);
+                var result = await SignInOrTwoFactorAsync(user, device);
                 if(result.Succeeded && device != null)
                 {
                     var existingDevice = await _deviceRepository.GetByIdentifierAsync(device.Identifier, user.Id);
@@ -105,7 +105,7 @@ namespace Bit.Core.Identity
 
             if(await UserManager.VerifyTwoFactorTokenAsync(user, provider, code))
             {
-                var token = await SignInAsync(user, false);
+                var token = await SignInAsync(user, false, device);
 
                 var success = JwtBearerSignInResult.Success;
                 success.Token = token;
@@ -127,7 +127,7 @@ namespace Bit.Core.Identity
             return JwtBearerSignInResult.Failed;
         }
 
-        private async Task<string> SignInAsync(User user, bool twoFactor)
+        private async Task<string> SignInAsync(User user, bool twoFactor, Device device)
         {
             var handler = new System.IdentityModel.Tokens.Jwt.JwtSecurityTokenHandler();
 
@@ -150,6 +150,11 @@ namespace Bit.Core.Identity
                 }
             }
 
+            if(device != null && !string.IsNullOrWhiteSpace(device.Identifier))
+            {
+                userPrincipal.Identities.First().AddClaim(new Claim("DeviceIdentifier", device.Identifier));
+            }
+
             var descriptor = new SecurityTokenDescriptor
             {
                 Issuer = JwtIdentityOptions.Issuer,
@@ -164,13 +169,13 @@ namespace Bit.Core.Identity
             return handler.WriteToken(securityToken);
         }
 
-        private async Task<JwtBearerSignInResult> SignInOrTwoFactorAsync(User user)
+        private async Task<JwtBearerSignInResult> SignInOrTwoFactorAsync(User user, Device device)
         {
             if(UserManager.SupportsUserTwoFactor &&
                 await UserManager.GetTwoFactorEnabledAsync(user) &&
                 (await UserManager.GetValidTwoFactorProvidersAsync(user)).Count > 0)
             {
-                var twoFactorToken = await SignInAsync(user, true);
+                var twoFactorToken = await SignInAsync(user, true, device);
 
                 var twoFactorResult = JwtBearerSignInResult.TwoFactorRequired;
                 twoFactorResult.Token = twoFactorToken;
@@ -179,7 +184,7 @@ namespace Bit.Core.Identity
                 return twoFactorResult;
             }
 
-            var token = await SignInAsync(user, false);
+            var token = await SignInAsync(user, false, device);
 
             var result = JwtBearerSignInResult.Success;
             result.Token = token;

src/Core/Services/PushService.cs

@@ -22,17 +22,20 @@ namespace Bit.Core.Services
     {
         private readonly IDeviceRepository _deviceRepository;
         private readonly ILogger<IPushService> _logger;
+        private readonly CurrentContext _currentContext;
         private GcmServiceBroker _gcmBroker;
         private ApnsServiceBroker _apnsBroker;
 
         public PushService(
             IDeviceRepository deviceRepository,
             ILogger<IPushService> logger,
+            CurrentContext currentContext,
             IHostingEnvironment hostingEnvironment,
             GlobalSettings globalSettings)
         {
             _deviceRepository = deviceRepository;
             _logger = logger;
+            _currentContext = currentContext;
 
             InitGcmBroker(globalSettings);
             InitApnsBroker(globalSettings, hostingEnvironment);
@@ -74,7 +77,13 @@ namespace Bit.Core.Services
                 Aps = new PushNotification.AppleData { ContentAvailable = 1 }
             };
 
-            await PushToAllUserDevicesAsync(cipher.UserId, JObject.FromObject(message));
+            var excludedTokens = new List<string>();
+            if(!string.IsNullOrWhiteSpace(_currentContext.DeviceIdentifier))
+            {
+                excludedTokens.Add(_currentContext.DeviceIdentifier);
+            }
+
+            await PushToAllUserDevicesAsync(cipher.UserId, JObject.FromObject(message), excludedTokens);
         }
 
         public async Task PushSyncCiphersAsync(Guid userId)
@@ -87,7 +96,7 @@ namespace Bit.Core.Services
                 Aps = new PushNotification.AppleData { ContentAvailable = 1 }
             };
 
-            await PushToAllUserDevicesAsync(userId, JObject.FromObject(message));
+            await PushToAllUserDevicesAsync(userId, JObject.FromObject(message), null);
         }
 
         private void InitGcmBroker(GlobalSettings globalSettings)
@@ -255,9 +264,10 @@ namespace Bit.Core.Services
             // timestamp is the time the token was reported as expired
         }
 
-        private async Task PushToAllUserDevicesAsync(Guid userId, JObject message)
+        private async Task PushToAllUserDevicesAsync(Guid userId, JObject message, IEnumerable<string> tokensToSkip)
         {
-            var devices = (await _deviceRepository.GetManyByUserIdAsync(userId)).Where(d => !string.IsNullOrWhiteSpace(d.PushToken));
+            var devices = (await _deviceRepository.GetManyByUserIdAsync(userId))
+                .Where(d => !string.IsNullOrWhiteSpace(d.PushToken) && (!tokensToSkip?.Contains(d.PushToken) ?? true));
             if(devices.Count() == 0)
             {
                 return;