System.Data.SQLite transaction lock whole database - sqlite

Question

I'm trying to insert into 2 different tables from different transactions. Unfortunally I'm getting "database locked" exeption onto cn2.Execute...
var cb = new System.Data.SQLite.SQLiteConnectionStringBuilder
{
BinaryGUID = true,
DataSource = string.Format("file:SqliteTest-{0:N}.db", Guid.NewGuid()),
FailIfMissing = false,
JournalMode = System.Data.SQLite.SQLiteJournalModeEnum.Wal,
LegacyFormat = false,
Pooling = true,
SyncMode = System.Data.SQLite.SynchronizationModes.Normal,
DefaultIsolationLevel = System.Data.IsolationLevel.ReadCommitted
};
using (var cn1 = new System.Data.SQLite.SQLiteConnection(cb.ToString()))
{
cn1.Open();
cn1.Execute("create table t_1(uuid BLOB not null primary key, ts INTEGER not null);");
cn1.Execute("create table t_2(uuid BLOB not null primary key, ts INTEGER not null);");
using (var cn2 = (System.Data.SQLite.SQLiteConnection)cn1.Clone())
{
using (var tr1 = cn1.BeginTransaction(System.Data.IsolationLevel.ReadCommitted))
using (var tr2 = cn2.BeginTransaction(System.Data.IsolationLevel.ReadCommitted))
{
cn1.Execute("insert into t_1(uuid,ts) values(#uuid, #ts);",
new { uuid = Guid.NewGuid(), ts = DateTime.UtcNow.Ticks }, tr1);
cn2.Execute("insert into t_2(uuid,ts) values(#uuid, #ts);",
new { uuid = Guid.NewGuid(), ts = DateTime.UtcNow.Ticks }, tr2);
}
}
}