iOS 17.2.1 post upgrade issues

Do you still have issues here?

I've noticed that issues perhaps arise due to a large number of contacts that try to sync to a device. For my environment, around 4k contacts need to be synced from outlook to the device. I think this process is probably very inefficient now and locks the contacts, causing any other app that utilises the local contacts to lock up, perhaps due to the contacts app being in a sync update that doesn't finish.

In my environment, duplicate entries start to appear and overall causes slowness on the device and battery drain. It makes sense that WhatsApp would struggle to operate if it is locked out from the locally stored contacts.

I didn't see this issue prior to 17.2. In 17.1, apparently an issue with contacts was seen for many, Apple addressed this in 17.2, this is when I saw issues happen. Perhaps the change in 17.2 introducted new issues, relating to contact sync. In 17.2.1 I saw no improvement to the sync issue.

A rebuild of contacts does appear to work, but for some this is only a temporary fix. See MS article here to rebuild the contacts -

https://learn.microsoft.com/en-us/exchange/troubleshoot/mobile-devices/duplicate-contacts-in-ios-contacts-app

iOS updates generally aim to enhance user experience, boost security, and fix bugs rather than disrupt core features. Various issues after updates might stem from underlying, unmentioned factors. Updates won't typically alter personal data but may refine settings or features. Backup before major updates for safety. Review Apple's update details and backup advice for a smooth process.

This seems purely coincidental so please check the Setting on your device.

1. Can’t find contacts: If you are unable to find your contacts which were stored in the email client, then try this --> Restore contacts, calendars, bookmarks, and more using ... Unlike some Android devices, contacts are neither stored locally on an iPhone nor in SIM. They are synced to an email account that you had Google, iCloud, AOL, Exchange, Outlook, Yahoo or any Other
2. cursor the middle of a sentence: Cursor, Text Insertion Point - Keyboard a… - Apple Community
3. WhatsApp call is not working : WhatsApp is not an Apple product. Contact the app developer here --> App Support or WhatsApp FAQ  Or Restoring your chat history - WhatsApp FAQ or Contact WhatsApp

See what each update does: About iOS 17 Updates, About iOS 16 Updates, About iOS 15 Updates, About iOS 14 Updates, About iOS 13 Updates, About iOS 12 Updates, and so on...

Same here … feeling terrible