Not really panicking just curious

I am 29w+3d, we had to go for a second anatomy scan yesterday bc she wouldn’t let them get everything they needed to last time and still didn’t bc she’s already stubborn lol. They told us that they are curious about her arm(s) being a little short, so they want us back for a third time. Everything else looked good and she’s a healthy weight. Has anyone else been told this and what was the outcome? Thank you!! 💙