[Bug]: nextcloud desktop mess up with my files: weird suffix show up when syncing

[binary-husky]

⚠️ 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

Sometimes weird suffix show up,
shouldn't nextcloud be in read only mode when uploading/syncing ??

...

Steps to reproduce

1. Open vscode to edit files handled by nextcloud desktop
2. Edit it and save it
3. Sometimes weird suffix show up
   ...

Expected behavior

When clicking on the share dialog, share by e-mail should be an option.
...

Which files are affected by this bug

.tex, .py

Operating system

Windows

Which version of the operating system you are running.

win10

Package

Appimage

Nextcloud Server version

23.0

Nextcloud Desktop Client version

3.5.0

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 Enabled

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

[anonbergine]

I had this issue today for first time, didn't realise it was nc until I saw this issue.

For me it was editing a .js file, using MS VS Code, in a nc managed folder. Suddenly there were red null markers at the very end of the file.

I've been editing that file for the past 6 months and not encountered the problem - maybe it is somehting to do with server being updated yesterday to latest stable?

[binary-husky]

I'm constantly running into this problem for several months,
it happens almost once / twice a day.

And I cannot even understand what nc is doing,
considering this file is only edited by myself and only edited on a single machine,
nc should have never asked for the file write privilage on this machine,
because all it has to do is read and upload in this case

[joshtrichards]

Duplicate of #5165