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FWIW, you can close the phantom tabs when Safari is closed on the affected Macs (for me both phantom tabs are from Macs and show up on iOS devices). This suggests that signing out of iCloud entirely and then back in will likely fix this issue. Or doing a clean install, if you want to give your Mac a performance boost. I'm not really in the mood to do either, so I will let these tabs drop off on their own in a week.

Edit: I signed out of iCloud and then signed back in on all the devices that were showing phantom tabs (two of them). This cleared up the issue.
 
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I’ll wait for September when the new iPhone comes out. Can’t be bothered going through all that effort haha

At least now my iPad and MacBook are in perfect tab history
 
I was worried today as my iPhone was showing phantom tabs for my Mac, but after force quitting Safari on my iPhone and re-opening, it resolved itself.
 
My Mac was complaining I needed to click a button to relog into iCloud, which I did. Shortly afterwards I noticed my iPad had a phantom tab for my Mac which wouldn’t close.

I disabled iCloud reminders (to fix the re-occurring reminder issue) and set date ahead 2 weeks, but I still couldn’t delete the tab. I then set it ahead 3 weeks and then I could delete the tab. I set the time back to automatic and iCloud tabs worked normally again.

At that point I tapped “okay“ on the warning, that the iPad hadn’t backed up in 2 weeks (which cleared it) and re-enabled iCloud reminders.

There should be an easier way to fix this though if it’s going to periodically happen.
 
Ha! I’m still stuck with one iCloud tab, after having “fixed” mu issue. This time it’s my iPhone on iOS 15 that’s showing my MBP on macOS 11.5 b3 has a tab open, that’s not. Before when I had this issue, it was reversed, with my MBP showing I had a BUNCH of open tabs on my iPhone.

¯\_(ツ)_/¯
 
Ha! I’m still stuck with one iCloud tab, after having “fixed” mu issue. This time it’s my iPhone on iOS 15 that’s showing my MBP on macOS 11.5 b3 has a tab open, that’s not. Before when I had this issue, it was reversed, with my MBP showing I had a BUNCH of open tabs on my iPhone.

¯\_(ツ)_/¯
As I shared earlier, I think the way to fix this is to sign out of iCloud and then back in all devices.
 
As I shared earlier, I think the way to fix this is to sign out of iCloud and then back in all devices.
I'm just going to wait until macOS 11.5 is officially released. I'm not signing out of iCloud on my MBP. I've had way too many issues after trying that before.
 
It's working mostly for me, but can be very slow. Yesterday it had tabs open from 3 days ago. Today it's working as normal. Either way it's broken a workflow I used to rely on. Fortunately I have not had an issue with Reading List.
 
It's working mostly for me, but can be very slow. Yesterday it had tabs open from 3 days ago. Today it's working as normal. Either way it's broken a workflow I used to rely on. Fortunately I have not had an issue with Reading List.
Interesting. After not working for seven or so months, this feature began working a couple of weeks ago and has been almost instant across all my devices. First couple of days there were some stuck tabs, which signing out and then back into iCloud fixed.
 
I've just disabled iCloud tabs from my Mac. Just too much of a hassle. I originally had the issue in the beginning of this thread, then it just fixed itself. Then I had one phantom tab, so I did what was recommended on here. Once I did that, then 20 phantom tabs showed up. Over and over signing out and signing back in on both devices, deleting devices from iCloud....to no avail. So yeah, no more tabs. That feature is disabled.
 
I've just disabled iCloud tabs from my Mac. Just too much of a hassle. I originally had the issue in the beginning of this thread, then it just fixed itself. Then I had one phantom tab, so I did what was recommended on here. Once I did that, then 20 phantom tabs showed up. Over and over signing out and signing back in on both devices, deleting devices from iCloud....to no avail. So yeah, no more tabs. That feature is disabled.

I don’t think anyone has been suggesting to sign out of iCloud lately. Personally I never do that because of how much it messes other things up.

The phantom tab fix just involves setting the date ahead 3 weeks, deleting the phantom tabs and then putting the date back to normal.
 
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I don’t think anyone has been suggesting to sign out of iCloud lately. Personally I never do that because of how much it messes other things up.

The phantom tab fix just involves setting the date ahead 3 weeks, deleting the phantom tabs and then putting the date back to normal.

Instructions please.
 
I think the time adjustment "trick" runs more risks of triggering bugs and unexpected behaviors than simply signing out and back into iCloud, which as I said fixed all the issues I was having with stuck tabs. I had several in the first days the tabs feature started working for me, and in the two weeks since signing out and back in, I've had zero.
 
I think the time adjustment "trick" runs more risks of triggering bugs and unexpected behaviors than simply signing out and back into iCloud, which as I said fixed all the issues I was having with stuck tabs. I had several in the first days the tabs feature started working for me, and in the two weeks since signing out and back in, I've had zero.

The signing out and signing back in failed for me. Instead of one phantom tab, it added 20.
 
Did your phantom/stuck tabs disappear after a week?
No, my iPhone 12 Pro on iOS 15 is showing I have one tab open in macOS 11.5 on my M1 MBP. It’s been showing that now for maybe 3+ weeks now? Can’t remember. But it’s only my iPhone that’s showing that macOS iCloud tab, not my iPad (on 14.6).

What had ”fixed“ this for Me before was Restoring my iPhone and reinstalling macOS over itself, and then the first time I opened Safari on my iPhone, all of the Mac iCloud tabs showed up, and I was able to close them and keep them closed. I’m not messing with the Date/Clock because that’ll screw up some of my meetings, not wanting to resend out invites in case something gets hosed. I’m planning on just reinstalling macOS 11.5 when it’s official and then maybe restoring my iPhone on whichever the latest beta of iOS 15 is.
 
No, my iPhone 12 Pro on iOS 15 is showing I have one tab open in macOS 11.5 on my M1 MBP. It’s been showing that now for maybe 3+ weeks now? Can’t remember. But it’s only my iPhone that’s showing that macOS iCloud tab, not my iPad (on 14.6).

What had ”fixed“ this for Me before was Restoring my iPhone and reinstalling macOS over itself, and then the first time I opened Safari on my iPhone, all of the Mac iCloud tabs showed up, and I was able to close them and keep them closed. I’m not messing with the Date/Clock because that’ll screw up some of my meetings, not wanting to resend out invites in case something gets hosed. I’m planning on just reinstalling macOS 11.5 when it’s official and then maybe restoring my iPhone on whichever the latest beta of iOS 15 is.
It's such a finicky feature. Hopefully with the next major updates, with the new tab groups feature, they finally manage to nail this function so that it stops working properly only for some and not for others.
 
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