Thank you, on hold with Cisco right now. Appreciate the rapid reply. 

To what does the patch need to be applied and how intrusive is the patching process? We are encountering the same bug and need to have this fixed ASAP. 

I was having the same issue and I located these release notes from January. According to Cisco, 88XX Series phones V08 or later are not capable of downgrading below 11.7(1). Hope this helps. https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/...