Construction Heuristics fail to initialize partially initialized solution

When Construction Heuristics are applied on a partially initialized solution, number of entities remain uninitialized.

Use Case - I have assignments with two planning variables time and resource. If I partially null resource variable (because some of resources are not available anymore) and then pass this solution to solver, I will get UninitializedSolutionException.

Easily replicable with simple testcase where you pass two instances of Foo to CH with following planning variable values:

Foo foo1 = new Foo();
foo1.setBar(null);
foo1.setBaz(null);

Foo foo2 = new Foo();
foo2.setBar("someBar");
foo2.setBaz(null);

Solution solution = ...
solution.getFooList.add(foo1);
solution.getFooList.add(foo2);

....
solver.setPlanningProblem(solution);
solver.solve(); // <- UninitializedSolutionException after CH phase since Baz of foo2 will not get initialized!

I tried to find out where the bug is but couldn't find the place, I assume it has something to do with the CartesianProductMoveSelector used by the DefaultConstructionHeuristicSolverPhase?

br
reinis