Dropbox Link Broken When Overwriting File

So I knew the deleting files thing was happening...interestingly enough, I did some more testing and it seems NOT to occur when saving .ai files, but does when I save as a .pdf . I primarily use .pdf because it doesn't change the editing experience for me, and is accepted across a wider range of applications. Plus the .ai scares off my co-workers even when it's pdf compatible...

I tested out the "do not sync" button in my right click file dropdown, then saved my pdf file while using illustrator as normal. Interestingly, the file re-syncs right after saving, but the share link STAYS THE SAME. So you're right, it's definitely the speed of the dropbox sync that detects the deleted file...

I can try to remember to always unsync when saving my files...this is better than the online upload alternative, but still pretty annoying. Any idea why this was not happening for years and years and suddenly became an issue? Also I wonder if dropbox could somehow program a short delay in syncing, or delay the deletion of links when a file is deleted to see if one with the exact same path and name pops back up in a millisecond. That's above my pay grade, but I'd love a solution that doesn't rely on my remembering to unsync or whatever before every file edit / save.