Macbook Pro sync errors only on WiFi - it works when connected to a different computer's WiFi

[gbarsh]

Running v202.4.5551 on 2 Macbook pros and 2 iMacs; longtime user with no problems until now.

One of the Macbook pros is new (an M1) and is unable to complete sync after desktop app installation. It will start OK but then stall after 5-10 Gb. This is selective sync for about 200 Gb of files that I want to maintain (and sync) offline. No sync issues are reported, and large files (10-20 Gb) that aren't on dropbox download quickly. (Running ~100 Mb/s).

This laptop is on the exact same home network with the other Macbook pro (with an intel chip) and both iMacs; there are no firewalls or proxies, and the other 3 computers are syncing just fine, running the same version of the app. Both Macbook pros are running Sonoma 14.5, and configured identically.

I tried the usual fixes: uninstalling/reinstalling app, advanced uninstall, fixing permissions and links, and syncing to an external SSD instead of the internal SSD, all to no avail.

I opened a ticket with support, was told that "it looks like we're consistently getting some errors indicative of an underlying connection issue", and was advised to unlink/remove the Dropbox folder from the app by signing out of the account, then relink with a new folder and path. That didn't work either.

What has worked, just in the last 2 hours is, instead of using the laptop's WiFi connection, using the WiFi connection on one of the iMacs, connected to the laptop via thunderbolt bridge. So...there's something about the laptop WiFi connection that doesn't play well with the Dropbox app. 

I realize this seems like maybe more of an Apple than a Dropbox question but hoped someone here with some Apple expertise might have a helpful suggestion. Thanks.

[Hannah]

Hey @gbarsh, thanks for reaching out to the Dropbox Community.

It does sound like a pretty strange issue.

You mentioned that you reached out to our support team; can you please give us the ticket number, so we can take a look at the communication?

Of course, the thread will remain open for other users to comment on, in case someone has had a similar experience.

Thanks!

[gbarsh]

It's ticket #23949307 which is still open.
In the interim I have been able to partially solve the problem by transferring the files (~280 Gb worth) directly to the new laptop and letting dropbox re-index them. For the last several days, small changes to files have been syncing correctly.

I will let things go for another day or two and then close the ticket.

Not sure what the problem was but glad that it seems to have solved itself.

Thank you.