Hi Pedia,
when you trace through your code you will see that the content of the properties changes immediately. However, the corresponding Text view will not change immediately when stepping through the code, because the Text view has to be redrawn.
Changing properties of views will mark the views as invalid - they will be redrawn within the next update cycle of the main loop.
Does this answer your question? If there is some other behavior, please provide a simple example.
Best regards,
Manfred.