So I've seen a similar issue in Horizon 6.2, but it did not occur after an upgrade. I opened a case with VMware support and after some troubleshooting they concluded it was an issue with VC Cache.
The recommendation was made to
- Shutdown all Connection servers in the pod.
- Shutdown Composer.
- Restart vCenter
- Bring back up Composer. (Wait until you see the log in screen)
- Power on one connection server at a time.
Looking at your Reddit post you already did something similar and it did not resolve your issue.
Do you see any errors oin the View Admin console?
I have upgraded both my home lab and Production Horizon 7 environment at my work and have not seen the issue you describe. We are using all Instant Clones in our Horizon 7 environment. We are getting ready to move our user from our Horizon 6.2 environment to our Horizon 7.3 environment.
Restart order of the View environment to clear ADLDS (ADAM) synchronization in Horizon View (2068381...
