DBAL insert with PostgreSQL throws "…invalid input syntax for type boolean: """"

[Hydoc]

I ran into this issue where our messages wont be inserted into the PostgreSQL enqueue table using the DBAL adapter. After some investigation I found that the DbalContext.php creates the table with a boolean for the column redelivered. However, when trying to send the message, the type in the insert is DbalType::SMALLINT in the DbalProducer.php. Was this intentional?

File: DbalContext.php

public function createDataBaseTable(): void
    {
        // …
        // here it gets created as a boolean
        $table->addColumn('redelivered', DbalType::BOOLEAN, ['notnull' => false]); 
        // …
    }

File: DbalProducer.php

$rowsAffected = $this->context->getDbalConnection()->insert($this->context->getTableName(), $dbalMessage, [
                'id' => DbalType::GUID,
                'published_at' => DbalType::INTEGER,
                'body' => DbalType::TEXT,
                'headers' => DbalType::TEXT,
                'properties' => DbalType::TEXT,
                'priority' => DbalType::SMALLINT,
                'queue' => DbalType::STRING,
                'time_to_live' => DbalType::INTEGER,
                'delayed_until' => DbalType::INTEGER,
                // here it is defined as a SMALLINT
                'redelivered' => DbalType::SMALLINT,
                'delivery_id' => DbalType::STRING,
                'redeliver_after' => DbalType::BIGINT,
            ]);

If I manually change it to DbalType::BOOLEAN the insert works as expected.

Have I done something wrong or is this a bug?