Arbitrations limit?

[DiabloMuerto]

Is there a limit to how many Arbitration missions you can do a day/week? I did 3 and it disappeared from my alerts list, is that a daily or weekly cap or some glitch?

[Fake]

If you click on the Arbitration tab, you'll see a timer.

[FoGsesipod]

arbitrations rotate on an hourly basis, you cannot complete the same arbitration twice within the hour