[Bug]: 4.0.0 Random files are deleted (Moved to Trash)

[RTechSn]

⚠️ 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

May be related or not to #8915 , but after discovery of this problem I've started checking Activity and noticed that a bunch of files and folders were deleted by me and other users, without any noticeable pattern.
Sometimes there were multiple per event, sometimes just one. Not very often, with a frequency ranging from several minutes to several hours.
I can unambiguously confirm, that I didn't do these deletions.
Fortunately, the files were found in Trash.
Can anyone check if they have this issue?

Steps to reproduce

1. Update Nextcloud Client from 3.17.3 to 4.0.0 on Windows
2. Wait a couple of days
3. Check Activity app, look for deletions you didn't perform
4. Check Trash in Files app

Expected behavior

This shouldn't happen

Which files are affected by this bug

no pattern

Operating system

Windows

Which version of the operating system you are running.

Windows 10

Package

Other

Nextcloud Server version

32.0.1

Nextcloud Desktop Client version

4.0.0

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

Updated to a major version (ex. 3.16.3 to 3.17.0)

Are you using the Nextcloud Server Encryption module?

Encryption is Enabled

Are you using an external user-backend?

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

Nextcloud Server logs

Additional info

Package is installed with Chocolatey

[RTechSn]

I can't tell if this problem is present on version 4.0.1.
We've just performed the update on multiple machines. We'll wait and see, I guess.

[Rello]

Hello,
neither 4.0 nor 4.0.1 perform any deletions. it was always about creating new folders.
which kind of files were deleted?

[nilsding]

this is very likely due to the same cause as #8953

[RTechSn]

Hello, neither 4.0 nor 4.0.1 perform any deletions. it was always about creating new folders. which kind of files were deleted?

We have a large amount of files, mainly xlsx, docx, pdf and folders. All of these types were affected.

this is very likely due to the same cause as

Interesting. Cloud be due to some of users (including my account) having multiple desktop clients connected, one of which having virtual files disabled.

[nilsding]

Interesting indeed... can you create debug archives of all involved clients and upload them to https://cloud.nextcloud.com/s/3ibwQ3TKsnbkJzq ?