Problematic tests list (15 rows):
bugs.core_0733_test  Compress Data over the Network
bugs.core_1263_test  GSec incorrectly processes some switches
bugs.core_5501_test  Unclear gstat's diagnostic when damaged page in DB file appears encrypted
bugs.gh_6220_test  Slow performance when executing SQL scripts as non-SYSDBA user
bugs.gh_6706_test  Memory leak when running EXECUTE STATEMENT with named parameters [CORE6475]
bugs.gh_8085_test  Memory leak when executing a lot of different queries and StatementTimeout > 0
bugs.gh_8263_test  gbak on Classic with ParallelWorkers > 1 doesn't restore indices, giving a cryptic error message
bugs.gh_8386_test  Crash when creating index on table that uses UDR and ParallelWorkers > 1
bugs.gh_8437_test  Segmentation fault when running query with partition by and subquery
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.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:
5.0.2.1615 2025.02.20 4a72664d  CS