The Wifi disconnect issue continues to despite the earlier fix to prevent power management from shutting down the adapter. The issue seems to be more around signal strength rather than either power supply issue since it is powered by a 2A brick. Others have handled it by running a job in the background every so often checking of the WLAN connection is up or if the Pi can access Internet. If not then they bring down the Wlan interface and bring it up again. This reestablishes the WiFI connection. This is kludgy workaround since the the system should reconnect automatically.
Since this is how others have fixed this, will attempt to use this solution with my Octopi.