Based on this article I'd suggest waiting until the issues are resolved:
Hey there. Thanks for the response. Do you know how to delete software update data from my phone? Despite having auto-update disabled, it still downloaded (but didn't install) 5.1.1. I now have the notification to install and don't want to accidentally click it/have the phone auto-install 5.1.1 after a time lapse.
I tried clearing the cache through the recovery boot mode to no avail.