Wish I could find a more neutral source, but this is what is available. I was surprised to see this, I had thought that shadowbans on twitter were like those on reddit, so only used for non-human bots.
It now seems populated with a combined 3 results between the two tabs linked. If it is a technical malfunction rather than a shadow ban, what do you suspect is happening?
EDIT: Adding archive links for proof, looks like 4 results combined: