It's not a bug, you need to increse the 'Threshold' value in 'Fix comed with deinterlacer' for the clip. 
(using i.e. 12 instead of the default 6 does seem to fix the problem here)
Cu Selur
(using i.e. 12 instead of the default 6 does seem to fix the problem here)
Cu Selur
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Dev versions are in the 'experimental'-folder of my GoogleDrive, which is linked on the download page.
Dev versions are in the 'experimental'-folder of my GoogleDrive, which is linked on the download page.