Problematic tests list (8 rows):

bugs.core_0733_test | Compress Data over the Network
bugs.gh_7436_test | Backup error for wide table
bugs.gh_8353_test | Report unique usernames for isc_info_user_names
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.intl.test_non_ascii_firebird_and_trace_utf8 | Check ability to obtain non-ascii content from firebird.log and trace when use ON DISCONNECT trigger and exception with non-ascii names, charset = UTF8.
functional.replication.test_make_async_reinit_reliable | Make asynchronous replica re-initialization reliable #8324

This list is the same for:

4.0.6.3169 2024.12.13 42cc1914 | SS