Problematic tests list (9 rows):
bugs.core_1746_test  Expression index can be created while doing inserts into table
bugs.core_1894_test  Circular dependencies between computed fields crash the engine
bugs.core_2140_test  Error messages after parameters substitution contains '\n' characters instead of line break
bugs.core_3450_test  Inefficient optimization (regression)
bugs.core_3610_test  Can insert DUPLICATE keys in UNIQUE index
bugs.core_3672_test  computed index by SUBSTRING function for long columns
bugs.core_3691_test  Missing constraint name in foreign key error message in FB 2.1.4
bugs.core_4302_addi_test  Lookup (or scan) in descending index could be very inefficient for some keys
bugs.core_4302_test  Lookup (or scan) in descending index could be very inefficient for some keys

This list is the same for:
6.0.0.1881 2026.04.05 0f9d237d  SS