I'd suspect not as for that top you can see the patterns of the top of jeans for example under it. If it was by design you'd see a flat top.
Also - to add to the original bug - if you put too many 'accessories' on the head of your Sim it causes the same thing.
The limit seems to be 3x.
I was having all the shirt untuck when I had a more than three of eyeshadow, eyeliner, lipstick, cheeks, along with hats and earrings.
So, for example: if I had a hat, I could then only do eyeshadow and eyeliner - if I added in lipstick the shirt untucked.
Or, I could only do 3 make-up types.
Didn't happen with every shirt (which made it even odder) - but it did it enough that it was frustrating!
And it did mean that with the new expansion I couldn't create a Sim with one of the new hats, earrings, a full face of makeup and a shirt tucked in!
