Hello lillyv717,
At this time, there is not a feature that would cause this to occur. Therefore, we'd like to provide you with a few steps that may help resolve the issue: (Please complete the steps in the order they appear)
• Delete the call history on your iPhone:
1. Open the Phone app, then tap Recents to view a list of recent calls
2. Tap Edit.
3. Delete your entire call history or a specific call. To clear all history, tap Clear, then tap Clear All Recents. To clear a single call, tap the Delete button
, then tap Delete.
• Restart your iPhone:
1. Press and hold either volume button and the side button until the power-off slider appears.

2. Drag the slider, then wait 30 seconds for your device to turn off. If your device is frozen or unresponsive, force restart your device.
3. To turn your device back on, press and hold the side button (on the right side of your iPhone) until you see the Apple logo.
Let us know if this helps.
Stay safe and well!