I just upgraded a HA setup of XG310 models to 18.0.3 MR-3 from the most recent 17.5 firmware. The upgrade appeared to have have gone smoothly but I discovered that the auxiliary device has ended up as "faulty". The device itself is in perfect working order. I ended up removing the HA setup and redoing it. I attempted to use the new Quick HA but it would just time out on the auxiliary device and never create the port. I did a complete factory reset on the auxiliary device and after that it allowed me to set it up but the primary kept coming back with "high availability could not be enabled" after the connection was made. My final attempt was to do the connection manually and everything connected fine but after it was fully complete, the auxiliary fell back to "faulty". I have no idea what to do at this point and I'm starting to think this must be a bug.
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