Kalanchoe (flapjacks/luciae) issue
I've been lurking here for a few months, and I appreciate all the good advice I've read--I've learned a lot already! I am currently having a strange issue with a kalanchoe flapjacks that I received as a gift. I've always had great success with succulents in the past, and at first this one seemed no different. But just a few weeks ago the bottom leaves started to shrivel up, while the rest of the plant looks totally normal and healthy. I've had it since August, it's planted in fast-draining succulent/cactus soil, it doesn't appear to have bugs of any kind and it is sitting in a southern exposure. Anyone have any ideas?? Is it normal for the bottom leaves to gradually die off, perhaps?
Thanks in advance for any advice you might have...
p.s. I know that bottom leaf looks like someone bit a chunk from it--it's just wear and tear from handling--the person who gave it to me works at a garden center and it was going to be thrown out at the end of the season so it had been handled a lot.