Why is spotlight so slow on my iPhone 6?

Hi!

I rely pretty heavily on Spotlight on the iPhone since I can never find the apps (have too many). Since iOS 9.3 the spotlight search is excruciatingly slow, sometimes it doesn't even give me results even if I spell out the whole name of the app I want to start. I have tried turning of Siri suggestions and also have excluded search results for all apps (since I always just want to search for an app and not within the apps). I have also restarted the phone and have tried a hard reset but to no avail.

Any suggestions?

Best,

Anders