Your image is not showing but i pulled the url and think i found it. Those are kinks. Sometimes they are genetic, but with that pairing it should not be. Possible other cause if there is more than one that looks like that would be high temps. If there are not more then you can chalk it up to being just a problem with that animal. It happens sometimes.
For those whoe want to see it the link to the image page is https://photos.app.goo.gl/xppKBNaE8vdgv4Ui9