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einarmr Author

Level 1

21 points

iOS 15.1 Calendar app is laggy and unreliable

When swiping between days, data often shows up as stale (events on the wrong day, or events at the "right" time but with wrong title).

Keeping the same day view open for up to 10 seconds seems to correct the issue (temporarily). This appears to be some kind of caching bug.

(This was *not* an issue in 15.0, 15.0.1 or 15.0.2. I have one MS Exchange calendar and three Google calendars.)

This has been reported by others as well: https://www.reddit.com/r/iOSBeta/comments/pxyrz2/calendar_is_extremely_laggyunusable_ios_151_beta/

iPhone 11 Pro, iOS 15

Posted on Oct 26, 2021 1:02 AM

Top-ranking reply

marcb70

Level 1

13 points

Posted on Oct 26, 2021 9:31 AM

Same here with an exchange account. As soon as I remove the company exchange account, it works fine (iCloud only in calendar).

Removing and re-adding exchange account does not help.

ios 15.1

iphone 13 pro

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312 replies

MUFC81

Level 1

4 points

Jan 20, 2022 9:52 AM in response to einarmr

This is a total disaster. When will we get a fix.

not only does the calendar lag but it mixes all the events up. Shows the wrong event on the wrong day. Then randomly corrects itself and happens all over again.

it’s almost unusable

Mar 1, 2022 8:13 AM in response to goodbyenine

goodbyenine wrote:

I’m in cloud calendar only (although multiple ones and a couple are shared) and I get this issue too.

If you are having a problem with iCloud.com, you should start a new thread as this thread is about the calendar on the iPhone and seems to have been resolved by updating iOS. You will get more and better help if you start your own thread.

Mar 1, 2022 9:38 AM in response to IdrisSeabright

thanks for your response but this is not an iCloud issue. I am referring to the use of an iCloud hosted calendar (ie an apple calendar) and accessing this on my iPhone. So it is an iOS issue and only today (I am on 15.3.1) I saw the issue occur again in front of my eyes. The week day at the top of the week view does not shift along with the content in the main view below. This can create a situation where it looks like I have nothing on Monday, when I do.

Mar 1, 2022 9:47 AM in response to goodbyenine

I would still recommend you start your own thread as, since you're not running iOS 15.1, your problem may have a different cause, even if the symptoms are similar. And, because the title of this thread talks about an older version of iOS, it has seen no traffic in over a month.

Oct 28, 2021 8:41 AM in response to einarmr

All, I installed iOS 15.2 yesterday and the problem still exists. I submitted another bug report to Apple with a video of the problem occurring. Hopefully they fix this soon.

Oct 28, 2021 12:30 PM in response to sreekantham

I have a support ticket opened on this. I have included this discussion link. If I hear of a resolution I’ll post back.

Oct 28, 2021 10:31 AM in response to yohanyoung

The issue is also reported and discussed here:

https://discussions.apple.com/thread/253296151

Nov 2, 2021 5:41 PM in response to deepfried2012

Checked in with Apple support. They've logged the issue but also suggested reporting it here so their dev teams have it firmly in their queue. https://www.apple.com/ph/contact/feedback.html

Nov 17, 2021 10:02 PM in response to 1234-sharon

The issue is NOT fixed.