I communicated the issue with lubos via email a couple years ago when I asked for assistance with the import of PayPal CSV files to my cash account (Import Bank Statement function). From your comments, it seems as though it was an undocumented feature, however, be assured that I have been using it regularly since then – at least every two weeks. It last worked shortly after 7/7/2017, but stopped when I updated the software today.
As the posts above from May 2016 shows, the PayPal import had stopped working last year, but was quickly resolved when I brought it to the attention of lubos. The screenshot shows the bank rules I have been using for quite a while that are now unrecognized by the software when doing my usual import.
