Missing update when updating a CONNECT table

After doing:

create table debit (ete int, hiver int, saison char(12)) engine=connect;
insert into debit(ete,hiver) values(33,44);
insert into debit values(11,23,'ete'),(17,24,'hiver'),(14,18,'printemps');
update `débit` set hiver=68 where ete in (11,17);

The update replies "affected rows 1" and indeed the row for ete = 17 is not updated.