Pretty sure the Splash edit was done specifically for Disney+
When this was going around the first time a few months ago, I saw a few people mention it was the TV version. Movie Censorship confirms that it’s the same as the one IMDb has listed for a while: https://www.movie-censorship.com/report.php?ID=765444
I believe the only thing Disney has changed specifically for D+ is Lio and Stitch, but I might be wrong.
It’s not weird, it’s just lazy. The Simpsons is cropped because that’s what Fox did for the HD version, and they’re too lazy to use anything else. Splash covers up the nudity because that’s the censored for TV version, and they just thought they might as well go with that.
As the occasional sight gag has been obliterated by the cropping, I can only presume it was supervised by Mr. Magoo.
Uncropped Simpsons reruns are still airing on a local L.A. station.
Not in HD.