diff --git a/src/grib_accessor_class_bufr_data_array.c b/src/grib_accessor_class_bufr_data_array.c
index 1058bb88e..ad1c8c1d1 100644
--- a/src/grib_accessor_class_bufr_data_array.c
+++ b/src/grib_accessor_class_bufr_data_array.c
@@ -1381,7 +1381,7 @@ static int encode_new_replication(grib_context* c, grib_accessor_bufr_data_array
     int err                       = 0;
     unsigned long repetitions     = 1;
     bufr_descriptor** descriptors = self->expanded->v;
-    /* Assert( buff->data==data); */
+    DebugAssert( buff->data == data );
 
     switch (descriptors[i]->code) {
         case 31000:
@@ -1425,6 +1425,7 @@ static int encode_new_replication(grib_context* c, grib_accessor_bufr_data_array
     grib_context_log(c, GRIB_LOG_DEBUG, "BUFR data encoding replication: \twidth=%ld pos=%ld ulength=%ld ulength_bits=%ld",
                      (long)descriptors[i]->width, (long)*pos, (long)buff->ulength, (long)buff->ulength_bits);
     grib_buffer_set_ulength_bits(c, buff, buff->ulength_bits + descriptors[i]->width);
+    data = buff->data; /* ECC-1347 */
     grib_encode_unsigned_longb(data, repetitions, pos, descriptors[i]->width);
 
     *numberOfRepetitions = repetitions;
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index d0287c0c7..638046659 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -99,6 +99,7 @@ if( HAVE_BUILD_TOOLS )
         bufr_ecc-1259
         bufr_ecc-1290
         bufr_ecc-1304
+        bufr_ecc-1347
         bufr_json_samples
         bufr_ecc-359
         bufr_ecc-517
diff --git a/tests/bufr_ecc-1347.sh b/tests/bufr_ecc-1347.sh
new file mode 100755
index 000000000..1cc2e7830
--- /dev/null
+++ b/tests/bufr_ecc-1347.sh
@@ -0,0 +1,44 @@
+#!/bin/sh
+# (C) Copyright 2005- ECMWF.
+#
+# This software is licensed under the terms of the Apache Licence Version 2.0
+# which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
+# 
+# In applying this licence, ECMWF does not waive the privileges and immunities granted to it by
+# virtue of its status as an intergovernmental organisation nor does it submit to any jurisdiction.
+#
+
+. ./include.sh
+
+set -u
+
+label="bufr_ecc-1347-test"
+tempBufr=temp.$label.bufr
+tempFilt=temp.$label.filter
+
+sample_bufr3=$ECCODES_SAMPLES_PATH/BUFR3.tmpl
+
+cat > $tempFilt <<EOF
+  set inputDelayedDescriptorReplicationFactor= {0};
+  set inputExtendedDelayedDescriptorReplicationFactor= {1458};
+  set masterTableNumber=0;
+  set bufrHeaderSubCentre=0;
+  set bufrHeaderCentre=98;
+  set updateSequenceNumber=1;
+  set dataCategory=2;
+  set dataSubCategory=0;
+  set masterTablesVersionNumber=27;
+  set localTablesVersionNumber=0;
+  set numberOfSubsets=1;
+  set observedData=1;
+  set compressedData=0;
+  set unexpandedDescriptors={
+     301128, 7007, 2102, 201133, 25065, 25066, 201000, 309052, 205011,
+     5001, 6001, 7001 };
+  write;
+EOF
+
+${tools_dir}/codes_bufr_filter -o $tempBufr $tempFilt $sample_bufr3
+${tools_dir}/bufr_dump -p $tempBufr
+
+rm -f $tempBufr $tempFilt