"send file?" dialog stays open after confirming the action

i want to send a file to another client via zeroconf via drag and drop. i get the "do you want to send the file?" dialog, and i click "ok". the file is sent correctly, but the confirmation dialog stays open and when i click "ok" again, the file is sent again. "cancel" simply closes the dialog. after clicking "ok", the dialog should be closed aswell.