Trello board subscription won't stick

[Don Karstedt]

Can anyone think of a reason why a subscription to a Trello board won't stick?

Scenario: I notice I'm not getting notification for a particular board. I check the settings, I click "subscribe", the menu item changes to "subscribed" to confirm. During the next day or two, I notice that I am still not getting notifications. I check the settings menu and see that I'm unsubscribed again.

Why is the system unsubscribing me?

[Matthew N]

Hey Don

It could be that your browser needs the cache cleared. Try that and see if the subscription sticks.  

[Don Karstedt]

The problem was apparent with the iPhone app. When I logged into the board through a computer and subscribed, it's stuck. ( and it stayed subscribed in the iPhone app too)

So apparently I've got it narrowed down to only having a subscription problem through the iPhone app. Have you ever heard of this behavior before?