columnstore batch insert doesn't work for decimals with utf8mb4 tables

there seems to be an issue with insert... select in tables with utf8mb4 charset and decimal columns

drop table if exists mcs;

create table mcs(

	s varchar(5) DEFAULT NULL,

	d decimal(7,3)

) engine=Columnstore default charset=utf8mb4;

set columnstore_use_import_for_batchinsert = 1;

insert into mcs(d)

select 1;

=> "Error code 9999: Values saturated" 

the problem is not present when not using cpimport, i.e. using columnstore_use_import_for_batchinsert = 0;

interestingly, the bug disappears if the table definition has the decimal column first, as in here:

drop table if exists mcs;

create table mcs(

	d decimal(7,3),

	s varchar(5) DEFAULT NULL

) engine=Columnstore default charset=utf8mb4;

set columnstore_import_for_batchinsert_delimiter = 5;

set columnstore_use_import_for_batchinsert = 1;

insert into mcs(d)

select 1;

=> 1 row affected

it seems that, to trigger the issue, we need a table with all of the following:

1. at least one varchar column in utf8mb4 (column or table, makes no difference)
2. at least one decimal column (scale/precision seems to have no effect)
3. decimal(s) column(s) not in first position(s) in the table

setup:

• columnstore is set to use utf8
• setting mariadb in utf8mb4/utf8mb4_unicode_ci or utf8/utf8_general_ci makes no difference