Not entirely sure how to caterogise this. I guess it falls under visual annoyances.
So I noticed that with the most recent patch, there's a new thing that says World 1, or Shipwrecked 1 on the clock. That thing appears after opening and closing the map, then blurrs out, but still remains slightly visible. I'm noticing something else at that as well, but I can't quite define what's wrong about it. I'll attach some screenshots.
I'm not sure if it's SW related. I think it is, but I can't confirm that.
Steps to Reproduce
Open a SW world, open and close the map, watch the clock.
This issue has not been confirmed by a developer yet.