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?