Problematic tests list (7 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

This list is the same for:

6.0.0.1887 2026.04.09 2e189290 | SS