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
That link looks like it’s attributing that digital-fur-tech change to Disney+, though. I also don’t believe Splash had any other TV edits made to it other than the ones initially made when it first got sold to network/syndication way back in the day.
This is the sort of change that would have/could have only been made on the cheap, and made very recently, and it’s just a lot more likely Disney applied the change themselves. Normally that edit is either a zoom in so you can’t see her buttcrack when she jumps into the water, or they cut back to Tom Hanks before she jumps.
It’s attributing them all to D+, but at the beginning speculates that they are simply ported over from the previous TV versions. Although the page has been translated so maybe something was lost.
But you’re right, IMDb doesn’t list the digital but alteration as a TV change, but it also doesn’t seem like their list is comprehensive. So it’s hard to say for certain one way or the other.
I wonder if Disney would foot the bill for proper Simpsons remaster of the older SD episodes? Would all the film still be stored somewhere?
I fully anticipate that when the show drops in 4:3 that it will be in SD. Doesn’t seem like they’d care to remaster when it’s only an incredibly niche audience they’d be servicing. If it shows up in HD, I’d think the logical assumption would be that it was work that had already been done (i.e. the remastered show before it was cropped to 16:9), not something Disney has done specifically now.