Still no problems for me (other than that pesky "forgetfulness" of the UPS permissions...) And the thick black smoke coming out of three of the five Diskstations. Also, the Rack Station started dating its sister.
I've upgraded on the backup NAS and haven't seen the SMB issue on Mac 10.11 (El Capitan) or 10.14 (Mojave) for two different accounts (standard and admin). The issue seems to have been with Finder not 3rd party apps, but Finder worked for me.
Hovering over the update button on the main NAS ....
Well, this is not the topic for this (we have one for it), but keep in mind that the community site is still the "official" site and Synology staff is there. Also, there is a major portion of users that still use it despite its looks and functions.
After doing a restart I received the email notification “..ds718 has been connected to ups.” However in the dsm ups tab it says “No ups connected.” I may just have to physically go to this site to unplug/re-plug to get the ups back up.