First I want to point out that the forum post listed above is from 2019 and would not be relevant here at this time.
Second, I was unable to replicate the issue. I tested with an 8.0.9 Backup with an 8.0.9 Gateway as well as an 8.0.7 Backup with an 8.0.9 Gateway. Both times, all items were disabled appropriately and the Gateway was renamed accordingly.
Could you please provide more background information in regards to what version of Ignition the backup is from? What OS? Did you try more than once? Any other information that may be helpful and relevant would be greatly appreciated.
Also, did you look in the logs to see if there were any errors in relation to the restore?