Currently, assisst notifications are only shown when in the normal first person view. They are not shown when you're zoomed into a train control computer screen (and I think also not when zoomed into the train journal screen). However, when traffic is high or trains are stuck, I usually stay zoomed into the train control screen for longer than the assist notifications show before the automatic kick. Those are also the situation where the assist functionality is needed most. Not being shown the notificatoions on that screen has resulted in me getting kicked without warning during troubleshooting.
Currently, assisst notifications are only shown when in the normal first person view. They are not shown when you're zoomed into a train control computer screen (and I think also not when zoomed into the train journal screen). However, when traffic is high or trains are stuck, I usually stay zoomed into the train control screen for longer than the assist notifications show before the automatic kick. Those are also the situation where the assist functionality is needed most. Not being shown the notificatoions on that screen has resulted in me getting kicked without warning during troubleshooting.