Problematic tests list (33 rows):
bugs.core_0733_test  Compress Data over the Network
bugs.core_1263_test  GSec incorrectly processes some switches
bugs.core_2197_test  Add support for -nodbtriggers switch in gbak into services API
bugs.core_2264_test  ALTER DOMAIN with dependencies may leave a transaction handle in inconsistent state causing segmentation faults
bugs.core_4473_test  Restore of pre ODS 11.1 database can leave RDB$RELATION_TYPE null
bugs.core_5089_test  Metadata extration (ISQL -X): "CREATE PROCEDURE/FUNCTION" statement contains reference to column of table(s) that not yet exists if this procedure had parameter of such type when it was created
bugs.core_5107_test  set autoddl off and sequence of: ( create view V as select * from T; alter view V as select 1 x from rdb$database; drop view V; ) leads to server crash
bugs.core_5501_test  Unclear gstat's diagnostic when damaged page in DB file appears encrypted
bugs.gh_4314_test  Sub-optimal predicate checking while selecting from a view [CORE3981]
bugs.gh_7304_test  Events in system attachments (like garbage collector) are not traced
bugs.gh_8386_test  Crash when creating index on table that uses UDR and ParallelWorkers > 1
bugs.gh_8488_test  MIN/MAX aggregates may badly affect the join order in queries with mixed INNER/LEFT joins
functional.arno.optimizer.test_opt_aggregate_distribution_03  Try to deliver HAVING CLAUSE conjunctions to the WHERE clause
functional.arno.optimizer.test_opt_aggregate_distribution_04  Try to deliver HAVING CLAUSE conjunctions to the WHERE clause
functional.arno.optimizer.test_opt_aggregate_distribution_05  Try to deliver HAVING CLAUSE conjunctions to the WHERE clause
functional.arno.optimizer.test_opt_aggregate_distribution_06  Try to deliver HAVING CLAUSE conjunctions to the WHERE clause
functional.arno.optimizer.test_opt_aggregate_distribution_07  Try to deliver HAVING CLAUSE conjunctions to the WHERE clause
functional.arno.optimizer.test_opt_aggregate_distribution_08  Try to deliver HAVING CLAUSE conjunctions to the WHERE clause
functional.arno.optimizer.test_opt_aggregate_distribution_09  Try to deliver HAVING CLAUSE conjunctions to the WHERE clause
functional.arno.optimizer.test_opt_aggregate_distribution_10  Try to deliver HAVING CLAUSE conjunctions to the WHERE clause
functional.arno.optimizer.test_opt_aggregate_distribution_11  Try to deliver HAVING CLAUSE conjunctions to the WHERE clause
functional.arno.optimizer.test_opt_aggregate_distribution_12  Try to deliver HAVING CLAUSE conjunctions to the WHERE clause
functional.arno.optimizer.test_opt_aggregate_distribution_13  Try to deliver HAVING CLAUSE conjunctions to the WHERE clause
functional.arno.optimizer.test_opt_aggregate_distribution_14  Try to deliver HAVING CLAUSE conjunctions to the WHERE clause
functional.arno.optimizer.test_opt_full_join_04  FULL OUTER JOIN, list all values, but filtered in WHERE clause
functional.arno.optimizer.test_opt_left_join_08  LEFT OUTER JOIN with full match, but limited in ON and WHERE clause
functional.arno.optimizer.test_opt_sort_by_index_10  ORDER BY ASC using index (multi)
functional.arno.optimizer.test_opt_sort_by_index_13  ORDER BY ASC using index (multi)
functional.arno.optimizer.test_opt_sort_by_index_19  ORDER BY ASC using index (multi) and WHERE clause
functional.basic.isql.test_02  ISQL - SHOW SYSTEM TABLES
functional.basic.isql.test_06  Let ISQL show per-table run-time statistics.
functional.replication.test_make_async_reinit_reliable  Make asynchronous replica re-initialization reliable #8324
functional.tabloid.test_333be4bf  Change error by warning in the case when isc_dpb_parallel_workers value is not at valid range

This list is the same for:
5.0.4.1812 2026.04.18 abe7e163  SS