Multiple query statements in PostgreSQL

[Elestara]

Hello,
It's related to issue #9767 but it seems like transactions are not working with PostgreSQL.
My syntax is

BEGIN;
multiple queries;
COMMIT;

And it leads to

Query Error: Cannot read properties of undefined (reading 'length')

I tried reduce number of statements, even set only one or START TRANSACTION syntax as well but no luck here. As was mentioned in related issue, it's hard to track more than 30 queries. Is there a way to commit multiple query statements in one field or it's a bug?
Thank you.