Dependency allows to change the progress of the successor when the dependency condition has not been met Declined - Not Valid

Hello, I am having an issue with the Gantt Chart involving Task with dependencies.

As stated in the documentation (check here) each type of dependency imposes a constraint to the successor task:

• Start to Start (SS): you cannot start a task until the dependent task also starts. 
• Start to Finish (SF): you cannot finish a task until the dependent task is started.
• Finish to Start (FS): you cannot start a task until the dependent task is completed.
• Finish to Finish (FF): you cannot finish a task until the dependent task is completed.

The problem is that defining a dependency between two tasks does not prevents me from changing the progress of the successor task when the dependency condition has not been met.

For example, in this demo https://ej2.syncfusion.com/react/demos/#/material/gantt/editing or

:

1. The task with id=6 ("Develop floor plan for estimation") has not been finished, progress is at 30%.
   
2. There is a dependency of type Finish to Start connecting

   task with id=6 to task with id=7.
3. The task with id=7 ("List materials") has not been started, progress is at 0%.
   
4. You can update the progress of task with id=7 even though task with id=6 is not finished (progress < 100%).  <-- ¿why is this possible? It shouldn't be allowed if I defined a Finish to Start dependency between those two tasks.