I'd not worry about it.
Already answered that question on the Dutch forum.
Ann, if your response was in English, could you please provide a link to that forum?Or better yet, repeat your answer for readers of this forum. I occasionally note a similar phenomenon when playing the timeline but don't see it in the final product (BD-disc) so I've not worried about it, as Jim advised. But, just curious as to cause.
No that was not in English.
If you are seeing interlaced scanning during playback on the timeline and not like TS in the Capture window during capture, then your fields for playback are probably not set correct.
Playback in the capture window is very low resolution and cannot be adjusted.