Hi! I tried downloading it directly from the site and downloading it to import within Bambu Studio, but I didn't encounter any problems.
I wouldn't want it to be a problem loading the file into Bambu Studio, or that it conflicts with the other files since it is set to work at a 0.16 mm size, while it may not be the same for the other keychains.
Try printing it individually, and let me know!
Enjoy Printing!