Hey there, let’s work through this frustrating notification screen lag issue on your iPad 4th gen running iOS 10.3.3. Given that app pages scroll smoothly and you’ve already tried removing all notification panels plus soft/hard resets, here are some targeted, device-specific fixes to try:

• Reset All Settings (No Data Loss)
  Old iOS devices often develop glitches from corrupted setting caches. Head to Settings > General > Reset > Reset All Settings — this won’t delete your apps, photos, or data, but will reset Wi-Fi passwords, wallpaper, and other preferences. After resetting, reapply your wallpaper and check the notification center again.

• Free Up Storage Space
  Low storage can cripple performance on older iPads. Go to Settings > General > About to check your available space. If you have less than 1GB free, delete unused apps, old photos/videos, or offload apps you don’t use often (you can reinstall them later without losing data). Even a small amount of extra space can help system processes run smoother.

• Refresh Notification Center Configurations
  Sometimes residual notification settings stick around even after removing panels. Try this:

  1. Go to Settings > Notifications and enable notifications for a few unused apps.
  2. Open the notification center to let these new settings load.
  3. Go back to Settings > Notifications and disable/remove all those panels again. This can flush out stuck cache files that might be causing the lag.

• Reinstall iOS via iTunes (Backup First!)
  If the above steps don’t work, a clean system reinstall might fix deep-seated system file issues. Here’s how:

  1. Back up your iPad using iTunes or iCloud to preserve your data.
  2. Connect your iPad to a computer with iTunes installed.
  3. In iTunes, select your iPad, then click Restore iPad. Follow the prompts to reinstall iOS 10.3.3.
  4. After the restore finishes, restore your backup and check the notification center.

Since your app scrolling is fine, the problem is almost certainly tied to the notification center’s specific system processes. Start with the quickest fixes first (reset settings, storage check) before moving to the full restore, as that’s more time-consuming.

内容的提问来源于stack exchange，提问作者akovia