Old thread. But as it's still not answered...
If the actual life time of elements in the recycle doesn't matter and the whole partition (with no exceptions) is selected to be backed up using File History the recycle bin can safely be disabled on this partition. I for my self decided to keep it enabled as i didn't want to backup the whole partition but most of it. In my case, the easiest setup was to select the whole partition and exclude few folders afterwards.
To exclude the recycle bin from the backup follow the steps below (Tested for Win10. There may be differences in the naming of the actual field names as i translated them from the German version of Win10):
a) Open an Explorer window and go to "Options -> Change Folder and Search options -> View"
Uncheck "Hide protected system files" and click "OK"
You should see the "$RECYCLE.BIN" folder now when you open a partition in an Explorer window
c) Open the File History settings and exclude the recycle bin(s) ($RECYCLE.BIN) from the backup like usual folders.
d) Undo step "b"