Several high-profile names removed from the title

At least three relatively high-profile names were removed from the cast of my feature film that is still in production: Ihor Kondratiuk, Garri Bardin and Haddaway. It's probably rather easy to re-add all three to the cast in bulk through Title Scorecard, but since there might be additional instruments to prevent further removal for a time being (and/or identifying whether edits are connected to the same user) I've decided that writing here before doing that might be a better course of action.

There are at least three possible versions of what exactly happened:

1) Cast listings were removed by representatives of actors through IMDb Pro. While it is a plausible explanation, all three are represented by different agencies from different countries so I find that unlikely given that disappearance seem to be sudden and in the same short period of time (more on that in 2). Moreover, there are several people of similar level of renown remaining in the cast list. It is of note that due to changes in the management of Haddaway rights to use our own footage of his appearance might've felt through since 2016 (when they were negotiated, initially), but I'd love to remove him from the cast myself officially if that is the case when it will be settled. 

2) As such, combined with sudden disappearance of one of my high-profile credits (Bohemian Rhapsody, already reinstated fully) I have quite a few reasons to suspect it is a deliberate act of vandalism/mischief on someone's part, perhaps targeting movie's relatively high STARmeter points. Title was previously vandalized several times by a tight group of haters, so it won't be a surprise if they resorted to this simply to "thwart" my "popularity". Ironically, I don't care about my popularity (with or without quotation marks) that much, plus if I did I probably wouldn't measure it with STARmeter. No offense to all the hard work put into that algorithm (which is rather impressive), but I'm just kind of indifferent to that feature and seldom even glance at it. 

3) A simple misunderstanding might also be at play: someone could've decided to remove odd-looking credits in a misguided cleanup edit, considering title suspicious. I admit that the film's listing so far probably looks rather strange for many people, but it is a no-budget film in production since 2007 that rose to semi-professional status from full-on amateur. We can't escape being strange and we probably don't meet some of the standards many hold for a high-profile production.  It's a trial and error with emphasis on error so far, but we all got to start someplace.