Yup; here contacted HAI Technical support when I first noted issues. It was with the Omnistat RC-80 to Omnitstat 2 installation.
I do also have an OPII legacy in Florida. Much simpler set up with no issues now for the last 3-4 years.
That said the only issue was the serial comm issue between the Omnitouch serially connected screens, network PCA, time sync and the serial com software I was using.
I am using HAI network stuff (software PCA and Snaplink and Omnitouch 5.7e screens); I have added an Omnitouch legacy serial hub and video hub and do not count this piece relating to the network issues.
Support was very good. We swapped the Omnistat 2's some 3 times. But the real issue I think was not related to the Omnistat 2 but rather the software. That is my personal opinion though.
I am OK right now with a pure serial connection. IE: Omnitouch legacy, Omnitstat 2 (serial), et al is working just fine. Omnitouch network is disconnected such that I have just a blue loading screen on the Omnitouch 5.7e screens, can't use PCA nor snaplink to test the network stuff.
The time is fine and my events / scheduled stuff is working OK.
The "old fix" was to disconnect the network interface for a few days then reconnect it.
Having to do a cold reset is really a mickey mouse way to fix my issue and is a PITA and would be difficult to do remotely (disconnect the battery and AC?)
Long story short, I rewrote much of my HAI code from scratch and problem solved.
Then you are ahead of HAI relating to your plugin and their Omnitouch 5.7e touchscreens (untouched base OS), PCA and Snaplink software; eh?
I have never tried CQC / HAI plugin or HAIKU (mostly cuz I am getting old?)