My client texted me about a corner flipping up. She just went on vacation to Costa Rica but I think it may have just loosened? How would you go about fixing this? Replace just the end bead or 2?

TIA
That happened to me to with my first model. I did a new end bead and re stitched it
Thank you
I tied the old string and the new string together and began stitching. As far as I know it worked and it was an easy fix🙌🏻