Since upgrading to iOS 18, an issue has been observed where blocked incoming calls display "(null)" instead of the actual application name. At the time the calls defined by the same application contain the name of the application correctly.
Incorrect display of (null) instead of application name under blocked phone numbers in iOS 18
Hello @glebfann, our engineering teams need to investigate this issue, as resolution may involve changes to Apple's software. I'd greatly appreciate it if you could open a bug report, include a sysdiagnose, and post the FB number here once you do. Bug Reporting: How and Why? has tips on creating your bug report.
Hello @Engineer! Thank you for looking into this issue. The FB number for the bug report is FB15272318