Why do some phone number lookups see groups that have not been added, while others don't?

Maybe we turned off the display of contacts by mistake in the address book group option.

Secret function of mobile phone: 1. Enter keywords, and all relevant items in your notepad and SMS will be searched out, whether you delete them or not. The solution: enter Settings → General →spotlight search → check the ones you don't want to find → remove them. 2. If you want to save an image of a website to your mobile phone, click and hold the image until a menu pops up, and then click "Save Image" to save it to your mobile phone. 3. Do not disturb function can be switched in Settings. Lock your phone when you sleep, which means you won't get information or phone calls. 4. You can enable the Emoji keyboard, and set it → General → Keyboard → Select "Add New Keyboard" → Scroll the page to find the newly added input method → Click Add. If you want to use emoticons, click a button on the keyboard that looks like the earth. 5. If you are reading a long list but want to jump back to the top of the page, just click the time displayed at the top of the screen.