It was reported in doctrine but i found its dbal issue.

doctrine/orm#5797

Un: https://github.com/doctrine/dbal/blob/master/lib/Doctrine/DBAL/Platforms/PostgreSqlPlatform.php#L521 there is no if for checking jsonb option. Changed column is passed to getAlterTableSQL in changedColumns array but no SQL is generated.

And i think its both ways from jsonb true to false and from false to true.

When you try to change json_array column to jsonb => true doctrine:schema:update prints:
Nothing to update - your database is already in sync with the current entity metadata.

To reproduce:

1. Create entity with json_array field
2. Create schema
3. Change column, add options={"jsonb": true}
4. Run doctrine:schema:update