Scenarios with and without Pre-Conditions are included in the same feature file

If a Test Execution contains a single Test Set and this Test Set has no precondition, when a user exports to cucumber, a feature file is created. This is correct.

If a Test Execution contains 2 Tests Sets, 1 Test Set with an associated Pre Condition and the other without, when the user exports, a feature file is created. This is incorrect. A zip file should be created. The feature file that is currently created contains all tests, some with a precondition and some without. This causes tests to fail.