It appears the "Create File" action was never fully functional, and quite
E.g. the text you enter in the 1st pane should be used as the filename,
whereas the current behaviour is to use the name you enter in the pop up
I managed to reproduce your original bug once, but cannot any longer. It
was most likely introduced when @skurfer fixed the indirect optional bug.
See the pull request at #847 for the changes that fix this