Today I was trying to override the Storm Watch setting on my system (to keep it *out* of Storm Watch mode, because that's still active). The Tesla iOS app seems to have accepted the change, but when we went into the peak period this afternoon, the Powerwalls didn't take over the load like they should have (so basically I've got full batteries, and my house is being run from the grid plus a little bit of solar). Multiple resets of the gateway and random fiddling with the app settings has not improved the situation.
Then I called Tesla Energy support and described the problem, and they said it's a known back-end issue affecting multiple customers, and they're working on it. No ETR at this point.
So if you've been relying on being able to toggle the Storm Watch override (like some of us might have been doing), consider that this might not work correctly just now. And yes I've been able to toggle this successfully the past few days.
Bruce.