Going to tell you some weird thing happened to me and solved this issue. I had iMazing installed on my mac (not an ad, actually it's been cracked lol) and I had a recent iPhone backup on it. It doesn't matter if a backup made with this issue already or not, I have had this bug since the October, but have backed up my iPhone with iMazing a couple of weeks ago. And all I did was launch the app on my mac and connected my iPhone via Wi-Fi (and the cable after some time). Then I didn't do literally anything, just been clicking here and there in the backup and the other places for like 30-60 minutes, tried to find and run the function I came for, so doesn't matter.
I did not restore, no new backups, no settings changing, nothing. After some time, I opened the spotlight on the phone and found the welcome screen hanging there. You know that one telling you about what you can search (I’ve attached the example from Google). I was like ok that's weird. But that's it, afterwards the problem has gone. These actions turned out as a solution for me, so you can try to replicate something like this by yourself and tell if it's gonna work for you.
P.S. I tried different versions of iMazing. I’ve had a cracked app on my Macbook and the official app with the free license on my iMac and also one two-weeks old backup shared to both of them. I don't remember on which of these macs this welcome screen happened in the spotlight. So, the problem is gone but it's still unclear what actions are the reason for the solution.
