NullReferenceException in ClusterNode.GetClusterMap leads to ObjectDisposedException

[15:53:48.653 WRN] [Couchbase.CouchbaseBucket] Process config push failed {}

System.NullReferenceException: Object reference not set to an instance of an object.

   at Couchbase.Core.Configuration.Server.BucketConfigExtensions.ReplacePlaceholderWithBootstrapHost(BucketConfig config, String host) in C:\code\couchbase-net-client\src\Couchbase\Core\Configuration\Server\BucketConfigExtensions.cs:line 149

   at Couchbase.Core.ClusterNode.GetClusterMap(Nullable`1 latestVersionOnClient, CancellationToken cancellationToken) in C:\code\couchbase-net-client\src\Couchbase\Core\ClusterNode.cs:line 479

   at Couchbase.Core.Configuration.Server.ConfigPushHandler.ProcessConfigPushesAsync(CancellationToken cancellationToken) in C:\code\couchbase-net-client\src\Couchbase\Core\Configuration\Server\ConfigPushHandler.cs:line 103     

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[15:53:48.664 WRN] [Couchbase.CouchbaseBucket] Process config push failed {}

System.ObjectDisposedException: Cannot access a disposed object.

Object name: 'MultiplexingConnection'.

   at Couchbase.Utils.ThrowHelper.ThrowObjectDisposedException(String objectName) in C:\code\couchbase-net-client\src\Couchbase\Utils\ThrowHelper.cs:line 60

   at Couchbase.Core.IO.Connections.MultiplexingConnection.SendAsync(ReadOnlyMemory`1 request, IOperation operation, CancellationToken cancellationToken) in C:\code\couchbase-net-client\src\Couchbase\Core\IO\Connections\MultiplexingConnection.cs:line 139

   at Couchbase.Core.IO.Operations.OperationBase.SendAsync(IConnection connection, CancellationToken cancellationToken) in C:\code\couchbase-net-client\src\Couchbase\Core\IO\Operations\OperationBase.cs:line 639

   at Couchbase.Core.IO.Connections.Channels.ChannelConnectionPool.TrySendImmediatelyAsync(IOperation op, CancellationToken cancellationToken) in C:\code\couchbase-net-client\src\Couchbase\Core\IO\Connections\Channels\ChannelConnectionPool.cs:line 156

   at Couchbase.Core.ClusterNode.ExecuteOp(Func`4 sender, IOperation op, Object state, CancellationTokenPair tokenPair) in C:\code\couchbase-net-client\src\Couchbase\Core\ClusterNode.cs:line 632

   at Couchbase.Core.ClusterNode.GetClusterMap(Nullable`1 latestVersionOnClient, CancellationToken cancellationToken) in C:\code\couchbase-net-client\src\Couchbase\Core\ClusterNode.cs:line 460

   at Couchbase.Core.Configuration.Server.ConfigPushHandler.ProcessConfigPushesAsync(CancellationToken cancellationToken) in C:\code\couchbase-net-client\src\Couchbase\Core\Configuration\Server\ConfigPushHandler.cs:line 103     

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