sRestore giving different results than in Avisynth.

[Selur]

Over at [url=https://forum.videohelp.com/threads/407209-Strange-fields-frames-in-analog-capture]videohelp there is a thread[/url] where Avisynth can be nicely used to remove some ghosting using

AssumeTFF()
QTGMC(Preset="Fast", ediThreads=2)
# removing ghosting
srestore(omode=6)
Preroll(Int(last.FrameRate()))

trying to reproduce this with Vapoursynth it using:

# setting field order to what QTGMC should assume (top field first)
clip = core.std.SetFrameProp(clip=clip, prop="_FieldBased", intval=2)
# Deinterlacing using QTGMC
clip = havsfunc.QTGMC(Input=clip, Preset="Fast", TFF=True) # new fps: 50
# make sure content is preceived as frame based
clip = core.std.SetFieldBased(clip, 0)
# adjusting frame count and rate with sRestore
clip = havsfunc.srestore(source=clip,omode=6)

havsfuncs sRestore doesn't remove the ghosting the same way the Avisynth version does. see: https://forum.doom9.org/showthread.php?p=1976139

Is there a bug in the port or am I missing something?