Cannot enter "app wiggle"/delete mode on iPad Air, iOS 11 I recently charged and turned on my iPad Air (Wi-Fi, US, 1st Gen) that I hadn't used for a while. It was on iOS 11.2.6 and after using it for some minutes, downloading and managing some apps, I noticed that the iPad refused to enter "app wiggle" mode upon holding apps. I can still delete apps from Settings, but not from the home screen.
I am also able to move apps around by holding and dragging them, similarly to an Android phone, but I can't get the apps to wiggle and have the "X" delete button. I have to hold and drag each app, while on other iOS versions I could just hold down once for ~1 second and then all apps would be draggable without any additional holding down.

I tried fully restoring the iPad to 11.4.1, the latest and the only signed version, with iTunes, and I even tried manually downloading an IPSW file and repeating the full restore. What surprises me most is that even after a full reset, the device still exhibits this bug.

On the other hand, all my other iPhones all work with wiggle mode in iOS 11. I couldn't find any information about this type of issue on the internet. Is this normal/expected behavior on iOS 11 iPads, or if not, what can I do to fix my iDevice?
To enter app wiggle mode on iOS 11 and up, only on iPad systems, it is necessary to hold an app icon for about four seconds, whereas on older versions it would activate much quicker. On the other hand, on iPad, apps can be moved without entering app wiggle mode.