Not exactly an issue, but most of the task in the dataset seems to have single unambiguous solutions while this and couple of others doesn't.
According to the rule we have to combine shapes in a way such that we get complete rectangle. Rotation is allowed. With that in mind solution like this should also be correct.
This is an acceptable level of ambiguity -- as long as there are no more than 2 likely solutions, we're clear. This is the reason why you're allowed several attempts per test grid.
Not exactly an issue, but most of the task in the dataset seems to have single unambiguous solutions while this and couple of others doesn't.
According to the rule we have to combine shapes in a way such that we get complete rectangle. Rotation is allowed. With that in mind solution like this should also be correct.