iOS 15.1 Calendar app is laggy and unreliable

Richie-red wrote:

Any ideas on when this will be resolved?

No one here in this user-to-user forum would know. Anyone who says they know is speculating, something that isn't permitted here.

I suggest you give your feedback to Apple. The more people who do, the more attention the issue is likely to get from them.

Product Feedback - Apple

iPhone 13 / iOS 15.1.1

Have been experiencing issues like everyone else here since upgrade, with exchange calendar frequently displaying wrong event name in a time slot or displaying no events at all. Contacted Apple via chat last night and then received a call from a specialist to screen share where I demonstrated issues. She suggested the sync issue might be due to the app-layer Vpn as part of device management from my company.

Curious as to whether others on this thread have some kind of security suite, etc from the organization affiliated with their exchange accounts (work, school, etc)?

the solution that I found is to remove the app and use ms-teams to get notification for all the calendars I have. 3 exchange, 1 outlook, 1 yahoo, 1 gmail. the calendar consumes almost half the battery on my 11 pro probably due to the issues.

its working for me until calendar is fixed.

Roberto2021 wrote:

It’s a good workaround.

I’ve waited too long for upgrading to latest release and now I regret of doing it.

I will try the Outlook App instead …

Apple: please fix this 😓

Apple doesn't read here for suggestions or feedback. If you want them to know your thoughts, use the appropriate link:

Product Feedback - Apple

Meanwhile, using a different calendar app sounds like a great idea. I've found Outlook to be quite nice to use.

Also shocked this is happening. Definitely experiencing the same issue.

With JUST google calendars syncing it works fine, but when I add exchange/outlook, this happens exactly as described.

Apple has stopped signing 15.0.2 (which didn’t have this problem) so hopefully a fix is near. I am using Outlook for the time being.

Removing my calendar widget from my Home Screen fixed the issue. I’ve added it back and will see if the issue comes back or not.

iOS 15.1.1 on iPhone 12 Pro

My workaround has been to use the Outlook app. I've removed my Hotmail account from it so I don't have a mish mash of emails.

PITA.

Fixed it. Downloaded the outlook app and it works.

Did you install 15.2? It fixes the issue.

I also am seeing this bug. Did not see this issue at all before 15.1. I am using Exchange, Outlook.com, and iCloud calendars. I also have a number of Subscribed calendars. I see the calendar load, but it takes a long time to refresh as I swipe through days on the calendar and/or it will show the time blocks on the calendars for meetings, but the wrong information will appear in the meeting time blocks. I also see this issue on my iPad which I also updated to 15.1 at the same time. If I display the Calendar on the iPad in Day view, I don't really see the issue, but if I switch to Week view and swipe left and right things get all messed up. If I tap a meeting in the iPad to view the contents, it will actually show the proper details and then when I tap off the time block on the calendar will refresh and then it is correct. I took a screen recording and send it to Apple under the case I opened.

Thanks for sharing. Clearly there are many people experiencing this. I’m surprised Apple is having people reset all settings. I have no plans to try that. The issue is clearly a problem with the Calendar apps internal code (i.e. a bug). hopefully we see it fixed rapidly in a 15.1.1 release.

I don’t think anyone should be resetting anything, let alone doing a complete factory reset of their phone. This is clearly a bug in the iOS Calendar app and a bad one at that. I can’t believe it got through testing and I hope Apple expedites the fix. I live by the Calendar app as an employee, parent, and volunteer. To not have the Calendar app working is a huge pain and disruption.

Creating a new appointment is almost impossible.

After entering the first letter in the title, the calendar hangs for 20-30 seconds. If you still enter further letters, they appear only after these 20-30 seconds. If you click on another field (place or time) the calendar hangs again for 20-30 seconds. Thus it takes 5 minutes or longer until an appointment is created.

Furthermore, the appointments are often not displayed correctly in the day view. Often not correct titles are displayed, titles of other appointments. If you touch this title, it jumps to the correct title and if you touch it again, the wrong title is displayed.

I have the problem after the update to 15.1 on my iPhone 12 Pro max and on my iPad Pro. My wife also has the same problems on her iPhone XS max after the update.

Unfortunately, restarting the device does not remedy the situation.

The calendar is currently unusable !!!!

Apple Support in the Netherlands listened to me and found multiple reports of the issue, so for sure the issue is recognized now within Apple as related to use of the Calendar with an Exchange account.

The only suggestion was to see if removing my Exchange solved the issue, which I refused as it makes no sense to test with an empty Calendar.

There is no solution yet.