No data gets loaded into BLOB column and the value is left NULL

cpimport is not able to load BLOB values. No data gets loaded into BLOB column and the value is left NULL.

Repro
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1. create schema
CREATE TABLE `lte_call_leg_by_mesh_2_IMSI` ( `MeshID` bigint(20) DEFAULT NULL, `IMSI` blob DEFAULT NULL ) ENGINE=Columnstore DEFAULT CHARSET=utf8mb3 COLLATE=utf8mb3_general_ci;

2. create text data and import
cat data.csv
1111111,oneoneoneoneoneoneoneone

cpimport -s ',' test lte_call_leg_by_mesh_2_IMSI data.csv

MariaDB [test]> select * from lte_call_leg_by_mesh_2_IMSI;
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1 rows in set (0.030 sec)
convert the above csv file into a binary file data.bin as follows,

3. create binary data and import
python program to create binary file for the above data.csv file>
import csv
with open('data.csv', 'r') as csvfile, open('data.bin', 'wb') as binfile:
reader = csv.reader(csvfile)
for row in reader:
binfile.write(bytes(','.join(row), 'utf-8'))

cpimport -s ',' test lte_call_leg_by_mesh_2_IMSI data.bin

MariaDB [test]> select * from lte_call_leg_by_mesh_2_IMSI;
-------------+

-------------+

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2 rows in set (0.034 sec)