Switching between files doesn't work properly - or at all
See the attached video. I have two files open. The second file I opened does not display. When I click on the file tab I still have the previous file displayed. Regardless of which file is active, I can only edit one. I can't even see the other. They are two completely different projects - they do not look the same. You are only seeing one file in this video, despite which one I select. I have to quite and restart, losing any changes I may have in the one file I cannot see.

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Sydney commented
The same thing is happening to me. It works sometimes, and other times it doesn't work. There's no sure way to get it to work.
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Anonymous commented
Also having this issue in Photoshop and Illustrator. It's been happening for quite a long time -- even between completely reinstalling MacOS on a new computer, between Macos Mojave and Catalina, and Between Adobe CC 2019 and now 2020.
If you take the window out of the tab you can see it, but otherwise it's either blank or the window content doesn't change. This also happens with other tabbed windos and pallettes as well -- same behavior, if you undock it you can see it, but dock it up and it's blank. I'm kind of tired of this..
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Sean Findlay commented
File A is open.
File B is double clicked to open in new tab.
File B info appears in tab header, but File A is displayed as the contents.
File B can be closed and its original contents are preserved.Illustrator 20.03
Mac OS 10.14.4 -
meghann sommer commented
has been happening to me non stop! adobe please help!
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Tony Kephart commented
I have the same issue, honestly ever since I upgraded to Mojave, my adobe has been a MESS!
Are you on Mojave? -
Anonymous commented
Wow I have this issue too could not for the life of me begin to describe the issue though - Thanks for bringing it up - happens to me at least 1-2 times a day - very annoying especially when i've got my rhythm going!
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Amy commented
If I have one document open and try to open a new one, Illustrator shows the new filename in the newly opened tab but with the OTHER document's content. This was happening in Photoshop too, and now both programs!
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Derrick Riley commented
This appears to be Adobe environment wide. This is the first I've run into this in Illustrator, but I have had the same problem with Photoshop. The only way to fix this is to drag the file out of the tray, but then you run into other issues with usability. I JUST UPDATED to 23.0.2 this morning after the fix with the toolbar has been giving me so much trouble.
I've included a screen video of the issue. https://vimeo.com/316804366
I am running Mac OSX Mojave 10.14 (18A391)I have an open thread about Photoshop on this issue here:
https://feedback.photoshop.com/photoshop_family/topics/repeatedly-photoshop-just-freezes-the-image-to-whatever-is-on-screen-but-doesnt-actually-change-the-window-to-what-it?utm_source=notification&utm_medium=email&utm_campaign=new_reply&utm_content=topic_link -
Anonymous commented
this has happened to me also
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Derrick Riley commented
Update: it also changes all layer and other panel info to match the correct file, but still does not change the window with the artboards & content.
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Derrick Riley commented
I opened a large file, while having a couple other docs open. My screen still shows the original doc in my window, with complete capability to edit, select, and pan, but is showing that I'm clicked into the new drawing at the top tab. This is a fundamental flaw to file opening that is only resolved by restarting.