Swiss Public Transport - Sensor stops working in the middle of the day

[hertg]

Home Assistant release (hass --version):
0.51.2

Python release (python3 --version):
Python 3.4.2

Component/platform:
Raspberry Pi 3 (Hassbian)

Description of problem:
The sensor doesn't update it's state after some hours.

Expected:
State should update and always show the next possible connection.

Problem-relevant configuration.yaml entries and steps to reproduce:

sensor:
  - platform: swiss_public_transport
    from: 8507493
    to: 8507000

Additional info:
Due to a change in the http://transport.opendata.ch/ API, there are now only 1000 Requests allowed per day. See here

The Sensor updates its state every minute, therefore it will stop updating itself after 16 hours (if you only have one sensor).

Maybe it would make sense to not update it until the current state "next departure" (timestamp) has passed?