Yesterday, I downgraded my iPhone 7 from iOS 11.3 Developer Beta 1 to iOS 11.2 Release (It was being signed then) using the "Upgrade" option. Downgrade went fine, but after the downgrade, the device started overheating and I discovered most of my data was corrupted, including Social media, Wifi and iCloud passwords and contents and some System Settings. I had no option but to restore the iPhone, so I restored to iOS 11.2 and it works fine now.
My question is: Is this a normal behavior after a downgrade (from a beta) using the "Update" option?