This is not fixed, still happening.

This message still popping up even after updating.

Still happening

2020 February 12, issue not fixed. The problem is still here: Adobe Illustrator v. 24.0.3, OSX 10.15.3 (19D76) Catalina, saving to MS OneDrive. Please fix it... again...

Same here: Adobe Illustrator v. 24.0.3, OSX 10.15.3 (19D76) Catalina, saving to MS OneDrive.

Still having this issue.

Version 24.0.3

OSX 10.15.3 Catalina

Saving to MS OneDrive

Is it that hard to add a "don't show me this anymore"

Awful UX, is because of things like this that people end leaving for Sketch or other tools. Adobe, you are a huge company, SOLVE IT, it's been more than a year already.

Not fixed ... appearing every time I save.

MacOS Mojave version 10.14.5
CC 2020 illustrator version 24.0.3

Have this problem.
Illustrator 24.0.1
MacOS 10.14.6
I also save my files to Google Drive File Stream; 36.0.18.0

I understand that you think you fixed this in 24.0.2, so I should update.
But based on a comment below that mentions the issue persisting even after they updated, and them also using Google Drive File Stream, I'm wondering if that's the issue.

Once I save a file in Illustrator (FILE>SAVE) and try to close the file the message pops up "If you don't save, your changes will be lost." And the option to save again comes up. What's going on?
See attached screenshot.
Using version 24.0.3

I get this error. Illustrator 24.0.3
MacOS 10.15.3 (19D76)
Saving files to Google Drive File Stream v36.0

Still getting this error in 24.0.3. Really would like it to stop.

This file has been modified outside illustrator. do you want to continue
Didn't had it for long but reappear recently almost every-time I wanted to save my files:
MacOS Mojave version 10.14.6
CC 2020 illustrator version 24.0.3

Still an issue on 24.0.3. It's almost become a part of my workflow, that extra click. Please fix this!

I'm still getting this in 24.0.3.
Exasperating.
C'mon Adobe get it together!!

Not fixed @ashutosh

Not fixed

Same issue, 24.0.3 running on Mac OS 10.14.6 Mojave

I'm having the exact same issue on a regular basis since updating to 24.0.02 on mac.

I just recently updated to 24.0.02 on a PC and I received this pop-up.