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

PrestonMag

Level 1

8 points

Posted on Dec 8, 2021 3:46 AM

It looks like a solution will be rolled out in 15.2 - released imminently

This release also includes bug fixes for your iPhone:

Siri may not respond while VoiceOver is running and

iPhone is locked

ProRAW photos may appear overexposed when viewing

in third-party photo editing apps

HomeKit scenes that include a garage door may not

run from CarPlay when your iPhone is locked

CarPlay may not update Now Playing information for

certain apps

Video streaming apps may not load content on iPhone

13 models

Calendar

events may appear on the wrong day for Microsoft Exchange users

from

https://www.macworld.com/article/547488/ios-15-2-features-release-how-to-install.html

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Similar questions

312 replies

Dec 9, 2021 5:20 PM in response to einarmr

I've got the same issues on my few devices with iOS 15.1, hope Apple can fix it ASAP please

Dec 13, 2021 9:54 AM in response to Armando Stettner

Armando, where did you learn a fix is on the way? What is your source of this statement?

Dec 13, 2021 1:29 PM in response to s.glogger

So it was not the exchange issue they were mentioning…

Dakta

Level 1

13 points

Dec 13, 2021 3:15 PM in response to s.glogger

The newest update didn't fix the error in photo storage though. Grrr.

suzuyasu

Level 1

8 points

Dec 13, 2021 6:54 PM in response to einarmr

So, this bug is not fixed yet as of 2021/12/14 (14th December, 2021) ?

Simone__

Level 1

8 points

Dec 13, 2021 7:27 PM in response to suzuyasu

i think mine is caused by Microsoft Defender so is different but MDE sent me here saying it was an apple bug.

Dec 14, 2021 10:44 AM in response to pkfoss

I want slow and laggy calendar back! I got used to it now i can’t use normal calendar..

Dec 14, 2021 12:15 PM in response to pkfoss

The issues only started occurring after ios15.2 not before

Dec 14, 2021 5:36 PM in response to einarmr

This is really frustrating. I’d like an answer on this subject with a resolution. Been going on for 2 months now

Dec 14, 2021 6:26 PM in response to Joel Forman

My issues only started with 15.2!!! Just now an entry on my calendar has disappeared but luckily it's still on my pac so I hope the other invitees still have it on their devices.

Rsobotka

Level 1

8 points

Dec 15, 2021 3:27 PM in response to einarmr

For the love of all things good and holy. This is the bane of my existence. Help!!!!!!!

Dec 18, 2021 8:12 PM in response to Yamil

yes - the issues for me only started with 15.2. I've spoken to others and they are also having problems following installing 15.2 - no issues with 15.1 - I wish apple would fix it

norm7653

Level 1

8 points

Dec 27, 2021 5:06 AM in response to yohanyoung

Do not test all the settings. I took mine all the way back to factory settings and the problem still persists!

Jan 12, 2022 8:47 AM in response to einarmr

I can't believe they haven't fixed this. I have the latest version installed but it still happens for me. How is this not a priority as it affects business accounts and personal?

Jan 12, 2022 1:19 PM in response to einarmr

Does iOS 15.2.1 solve this?

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iOS 15.1 Calendar app is laggy and unreliable