Problematic tests list (14 rows):

bugs.core_0733_test | Compress Data over the Network
bugs.core_2264_test | ALTER DOMAIN with dependencies may leave a transaction handle in inconsistent state causing segmentation faults
bugs.core_2966_test | Wrong results or unexpected errors while sorting a large data set
bugs.gh_7436_test | Backup error for wide table
bugs.gh_8488_test | MIN/MAX aggregates may badly affect the join order in queries with mixed INNER/LEFT joins
bugs.gh_8926_test | Indexes may not be used for multiple ORed conditions containing both field and non-field references
bugs.gh_8965_test | Wrong PERCENT_RANK computation
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.metacache.core_4386_metacache_test | Error 'object in use' must NOT raise in 6.x with shared metacache (opposite outcome to prior versions).
functional.replication.test_make_async_reinit_reliable | Make asynchronous replica re-initialization reliable #8324
functional.replication.test_missed_privilege_for_object_belonging_to_non_dba | Replication stops if GRANT issued by NON-DBA user who has RDB$ADMIN role and appropriate object (table, etc) belongs to another user
functional.replication.test_sync_replica_server_hangs_on_disconnect | Synchronous replication hangs on disconnect [CORE6497]

This list is the same for:

4.0.7.3251 2026.02.24 4fb4ad2c | SS