When Will A Delete Happen On The Server During Upload?

[WhatImListnTo]

I am using Cyberduck version 9, and I have been performing a multi-day SFTP upload to my server. I notice that I am abler to perform adhoc single file uploads that take place right away during this existing upload operation. I am also noticing that when I perform a delete of existing files previously uploaded within the past two days, this does not happen on the server. After performing the delete in Cyberduck, I see the file within Cyberduck list on the server vanish. However, if I refresh, the file will return. Also, the file still exists in my SSH shell directory listing.

If I can perform additional uploads that happen right away, why am I not able to perform a delete that also happens right away?

[WhatImListnTo]

I just attempted this a second time a minute ago, and the file was deleted right away from the server. I am not sure why I faced this issue hours ago, but now it is working as expected.

[WhatImListnTo]

Scrolling through shell tree I still see the two files I attempted to delete hours ago. I just right clicked the two files in two different directories from Cyberduck, clicked delete, and I confirmed that the files were deleted right away from the server. This is the second time doing this, so I am not sure what the issue was the first time. The debug logs get overwritten too fast, so they are long gone by now.