I gathered this from this quote (and not a direct check by myself, like I did with the Imprint and Paramount BDs) : https://forum.blu-ray.com/showpost.php?p=19765495&postcount=193
As I wrote above, people can very much do both ; enjoy the movie, but also report their thoughts on the technical...
Rainbow effect is a technical limitation of an equipment that you can't "fix".
This isn't the case here. It's not a technical limitation, it's an encode glitch that shouldn't have passed QC. It can be detected by looking more closely to the disc content like I did with the screencaps I linked...
I didn't quote it entirely, because I just wanted to answer to a specific part of your point. I does seem, indeed, that it's a matter of being more or less sensitive to an issue, but what I wanted to point out is that this aside, not looking for it and just watching and enjoying the movie in...
Since you were talking about 23.976 and then 24, I was under the impression you were suggesting the issue and its fix in Australia might have come from one disc being encoded at 24fps and the other one 23.976. Hence my remark.
It's not a limitation of 24fps vs 23.976fps. Both discs are actually encoded at 23.976fps, and are clearly sourced from the same digital master.
I don't think there's any bigger answer than Paramount having outputted a subpar encode in this regard, which creates ghosting that isn't on the...
Following up on the above, it turns out the Australian disc doesn't show ghosting at all.
https://screenshotcomparison.com/comparison/21507
It's a totally different encode and authoring, so it suggests that either Imprint managed to fix it or, more likely, Paramount's encode is the culprit...
It's not equipment-related, the issue is baked on the disc, ie in the on-disc files, so whoever plays the disc will go through the issue.
However, some people might not be sensitive enough to detect it, and some equipment might not be 100% transparent to what's on the disc and hide the issue...