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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

Best 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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Similar questions

312 replies

Dec 19, 2021 10:13 PM in response to einarmr

Is there is any progress or solid reply from Apple side regarding this problem? I don't want to delete or reinstall any of my calendars. This bug should be handled by Apple team.

Dec 20, 2021 3:15 PM in response to Mrizkanabi

I spent three hours and twenty-three minutes with senior advisors and this issue continued on all the Apple devices I own. No resolution for me with any of the updates released.

James_R1

Level 1

8 points

Dec 21, 2021 3:40 PM in response to einarmr

The latest IOS update fixed this for me! (15.2 19C57) calender app working fine with exchange accounts synced

Dec 22, 2021 5:23 AM in response to Armando Stettner

Thanks Armando for the clarification, Any clue why the problem still exists for me? I’m using iOS 15.2

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?

Jan 12, 2022 2:13 PM in response to Zensanzon

I had this issue with 15.0 and 15.1. I’m on 15.2 and I don’t have the problem anymore. It’s still a bit laggy for me, but much improved where I can live with it.

Jan 15, 2022 6:41 PM in response to einarmr

fixed for me in 15.2.1 iphone X

Jan 17, 2022 9:18 AM in response to einarmr

Has anyone seen this resolved or gotten a fix from apple yet? January 2022 and I’m still experiencing this same issue with my calendar.

Jan 17, 2022 11:45 AM in response to IdrisSeabright

This issue only started for me with 15.2 and no it is not resolved

Mar 1, 2022 6:58 AM in response to einarmr

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

iOS 15.1 Calendar app is laggy and unreliable