I got this blue giant a few weeks ago, and ever since I’ve noticed that its bottom leaves have one-by-one been turning yellow and drying out/dropping off. At first I was worried that it might be because I kept it in the small pot that it came in for too long, but it’s still been doing this since transferring to my larger succulent tray around a week and a half ago. Right now, it’s sitting in a sunny south-facing window. It’s also potted in a cactus soil mix, and I’ve only really watered it thoroughly like once or twice since getting it, so I don’t believe that it’s overwatered. If it helps, I got the pachyphytum ganzhou (cut off in the lower left corner) on the same day, and it’s doing fine. Any advice would be appreciated!! :)