It seems to have started working again when *I* use @ tags, but it still isn't working from other people's accounts. I'll attach screenshots below of a post that @Ian Molton tagged the meme account in, as viewed from my account and the meme account.
As you can see, only the text is being shared, the image disappears.
RIP Donald Triplett (1933–2023), who at the age of 5 became the first person to be given the newly-conceived diagnosis of autism. In the writings of Dr. Leo Kanner, the child psychiatrist who came up with the diagnosis, Mr. Triplett is referred to as "Case 1."
Image description courtesy of Vero Algoz:
The photo shows a photo of a bald, white, male looking person, not really looking into the camera.the person wears a white shirt and suspenders, and the background seems like an autumn landscape of trees without leaves.