Konsole 18.08 no longer shows a popup message when dropping a file. It just copies the file url to the terminal. I thinks it has something to do with _dropUrlsAsText The old behavior (18.04): https://imgur.com/R9lwc1C
This was done on purpose - the default is no menu - there's a profile option to enable the menu if you want. Profile->Mouse->Disable drag & drop menu for files &URLs