Sync also sync's recycle bin sometimes


sometimes - but not always - I've noted the the sync also sync's the recycle bin.

I sync the root of my drive against my backup drive (into a specific folder). During the sync I don't show hidden or system files (I only enabled it for the screen shot).

Is this a bug or not?
How can I avoid this?

Sreen shot:

Also after the sync DO does not stop "Reading contents of sub-folders ...".

I just did this with Beta - but I know that both issues have happened also during the past (final) versions (and not always together).

Thanks a lot!