[Bug]: Changes to synched folders also affected synching on other computer

[janvlug]

⚠️ Before submitting, please verify the following: ⚠️

• This is a bug, not a question or a configuration issue.
• This issue is not already reported on Github (I've searched it).
• Nextcloud Server and Desktop Client are up to date. See Server Maintenance and Release Schedule and Desktop Releases for supported versions.
• I agree to follow Nextcloud's Code of Conduct

Bug description

I disabled synching of some specific folders on my laptop, and it seems that it also got disabled on my desktop.

Steps to reproduce

1. Disable synching of a certain folder on one computer

Expected behavior

Other computers that sync with the Nextcloud server shall not be affected, but there synchronization seemed also to be disabled.

I could not reproduce this behavior yet. I will update this issue if I have more details.

Which files are affected by this bug

?????

Operating system

Linux

Which version of the operating system you are running.

Fedora 40

Package

Distro package manager

Nextcloud Server version

28.0.9

Nextcloud Desktop Client version

3.13.2

Is this bug present after an update or on a fresh install?

Updated from a minor version (ex. 3.4.2 to 3.4.4)

Are you using the Nextcloud Server Encryption module?

Encryption is Disabled

Are you using an external user-backend?

• Default internal user-backend
• LDAP/ Active Directory
• SSO - SAML
• Other

Nextcloud Server logs

No response

Additional info

No response

[janvlug]

Here some screenshots of the desktop computer where synching incorrectly got disabled:

In Nextcloud desktop:

In nautilus, I see a yellow exclamation mark for these folders:

I never disabled synching for these folders on this desktop computer, and for the Financieel folder, I doubt that I ever disabled that on on the laptop as well. But maybe I disabled synching sub-directories in Financieel on the laptop.

[janvlug]

I tried to reproduce this by creating some test directories etc. but unfortunately, I could not reproduce this issue in a test setting. However, today, after upgrading to Nextcloud 29.0.4 again the synchronization was disabled on a lot of directories on my desktop. Again these were directories that I do not sync (or only partially) to my laptop.

Currently using Nextcloud Desktop v3.13.2

[janvlug]

Maybe related: the directories that lost synchronization on the desktop are all huge directories.
I think I saw a message about not synchronizing directories that were above 502 MB, the limit that I have configured to ask above. Could it be somehow that Nextcloud client "forgets" that I have allowed the large directories to synchronize?

[janvlug]

Maybe unrelated, but I notice now also that there are two Nextcloud icons in the system tray:

Also:

$ ps -aef | grep -i nextcloud
jan      1006347 1006065  0 Sep02 ?        00:15:11 /usr/bin/nextcloud --background
jan      1243941 1006092  3 10:57 ?        00:02:54 /usr/bin/nextcloud

[janvlug]

I think something related to this happened again. On my laptop, I got notification that several folders that were too large for the default synchronization were not synchronized. Some sub directories in these large directories were synchronized though.
The synchronization stopped, but the files remained on my laptop. Quite scary to see this types of issues happening regularly lately. Fortunately, I did not encounter data loss. But I do loose synchronization, and I have to be careful now for my "disconnected" Nextcloud clients to not get out of sync, resulting in merge conflicts.