Client unable to sync/delete folder/files after them being deleted on other client (same user)

[bigretromike]

⚠️ 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 have searched for 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 have same user logged on two machines.
At 15.01 on machine B i downloaded few zips and copied them into folder, and it was locally on B.
Yestarday, 29.05 on machine A I was copying those *.zip-s to SMB location, it was time consuming because some of those zip-s had 2-3GB, so My A machine had to download if from cloud so Windows could copy them to SMB. I copied them successful and deleted them from machine A.

At morning I notice red icon on machine B, looking at gui I saw "unable to synchronize some files" and "Temporary error while removing local element from server".

On server the files are already deleted with parent directory. So my understanding is that client complain because it want to delete local files from server but they are not on server any more ?!?!

Could this be the after-match from many many many patches ago where there was a patch for not removing content from client if remote mounted data disk was disconnected from server ?

I had similar behavior on friends pc when it would even recreate those folders/files that where renamed/deleted - because it would stuck on similar error and made essential ghost files and folder, but I assumed it was because he used 4.0.x version of desktop and the workaround was to delete all files/folders that where already deleted from server form his copy of vfs and the client would synch correct.

Steps to reproduce

1. create files on machine A
2. sync them to machine B
3. remove them on machine B
4. machine A complain
   ...

Expected behavior

When deleting successfully folder/files from one machine on same account, other machines should comply and delete local copy
...

Which files are affected by this bug

folder "Downloads/artysta_z_twitta/" files inside this folder like: 2019.zip 2020.zip

Operating system

Windows

Which version of the operating system you are running.

Windows 11 Pro (both clients)

Installation method

Official Windows MSI

Nextcloud Server version

33.0.3

Nextcloud Desktop Client version

33.0.5 (with vfs enabled)

Did this occur after an update or on a clean installation?

Clean desktop client installation

Are you using the Nextcloud Server Encryption module?

No

Are you using an external user-backend?

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

Nextcloud Server logs

log: 0, does not show anything in the time client return error.

Additional info

Client log from one of the time it triggers
20260530_1105_nextcloud.log.8.zip

[bigretromike]

I think I found the issue. Normally I would delete whole folder, but this time I tried deleting all but one files that was inside that folder. I left 2019.zip. When I was deleting manually those files I had windows asking me if I want to delete those because they are to big to be moved to trash so the deletion will be permanent.
As soon I deleted those big files and the smaller one was left, and I hit "synch" in client the issue resolved itself.

Could this be issue with client not being able to move files to trash (because of lack of space?) and panicking over different prompt ?
(aka perm deletion)