Problems using inserter with OnDuplicate.Ignore.

[TheFlyingFiddle]

When I run the following code:

auto client = new MySQLClient(...);
auto con = clieck.lockConnection();

con.use(my_db);
auto insert = inserter(con, OnDuplicate.Ignore, "users", "googleID");
foreach(i; 30 .. 40) {
insert.row(i);
}
insert.flush;

I get the following error on the flush call:
core.exception.AssertError@.dub\packages\mysql-lited-0.3.15\mysql-lited\src\mysql\packet.d(53): Assertion failure

0x0059A99B in _d_assert
0x0048E071 in void mysql.packet.InputPacket.skip(uint) at dub\packages\mysql-lited-0.3.15\mysql-lited\src\mysql\packet.d(54)
0x00477FD9 in D5mysql10connection84__T10ConnectionTS5mysql6socket10VibeSocketVE5mysql10connection17ConnectionA0698ACEAD000617DF0366730C40E1B2 at dub\packages\mysql-lited-0.3.15\mysql-lited\src\mysql\connection.d(691)

---

The table looks like this:
create table users ( id int auto_increment,
googleID bigint unsigned unique,
primary key(id))

When I use OnDuplicate.Error everything works fine. (unless i have duplicates ofc)
Am I using the inserter wrong or is there something else that is problematic?

[TheFlyingFiddle]

This works as expected:
foreach(i; 30 .. 40) {
con.execute("insert ignore into users(googleID) values (?)", i);
}