Linux Vapoursynth problems

[Selur]

Script looks fine:

# Imports
import vapoursynth as vs
core = vs.get_core()
# Loading /home/miro/Videos/test/avidv.mkv using LWLibavSource
clip = core.lsmas.LWLibavSource(source="/home/miro/Videos/test/avidv.mkv", format="YUV420P8", cache=0)
# making sure input color matrix is set as unspec
clip = core.resize.Point(clip, matrix_in_s="unspec",range_s="limited")
# making sure frame rate is set to 30000/1001
clip = core.std.AssumeFPS(clip, fpsnum=30000, fpsden=1001)
# Setting color range to TV (limited) range.
clip = core.std.SetFrameProp(clip=clip, prop="_ColorRange", intval=1)
# adjusted resizing to achieve PAR 1:1 for preview (1)
clip = core.fmtc.resample(clip=clip, kernel="spline16", w=854, h=480, interlaced=False, interlacedd=False)
# adjusting output color from: YUV420P16 to YUV420P8 for x264Model (i420)
clip = core.resize.Bicubic(clip=clip, format=vs.YUV420P8, range_s="limited")
# Output
clip.set_output()

there is still the 'qt5ct: D-Bus global menu: no' message, no additional error messages or similar. :/
No error message about a missing filter or similar,..
No clue why Hybrid would close when the preview gets closed. Does it also close Hybrid if you press ALT+F4 to close the Vapoursynth Preview window?

Cu Selur