App freezes on delete of folder(s) on s3

Within the s3 bucket (right pane). I select for example 4-6 folders to delete. The app instantly becomes not responsive (frozen).
Popup prompt of deletion window comes up showing the file being deleted or folder. But takes forever or just hangs non responsive for up to 1min at a time. This cycle continues for hours.

When I use an alternative android s3 app to delete the same folders. It's finished in seconds.

Folders in the bucket have 1000s of files or no files just empty purged folders. Same hang result in winscp.

Winscp version: latest
OS: win10

Loquanet wrote:

I select for example 4-6 folders to delete. The app instantly becomes not responsive (frozen).
Popup prompt of deletion window comes up showing the file being deleted or folder. But takes forever or just hangs non responsive for up to 1min at a time. This cycle continues for hours.

So instantly after you select them? Or only after the progress window shows?

Please attach a full session log file showing the problem (using the latest version of WinSCP).