Automatic extension of deferment from mobilization

I received a deferment from mobilization because I care for a relative with a disability. I read that now, supposedly, it can be extended automatically via the 'Reserve+' application. If my deferment was not extended automatically and the date in the electronic document was not updated, can I lose this right and is it considered that the deferment has expired? What should I do in such a situation to avoid problems with the TCC?