Sounds to me as tho its dead or dying .
Can you trim the dead leaves off to try and promote re growth?
Could be a mixture of things maybe a tad more information on your soil, feeding/watering habits .
Here’s a picture of it. I needs a lot of sun, and I’m thinking that maybe it’s not getting enough? I’m going to move it closer to a window and see what happens. The soil is not dry, so, it’s not like it’s lacking in moisture.
@sandystrachan Could be, I don’t know. Not sure what the problem is. Kalanchoe’s can tolerate a lot of sun. I have few other plants beside it that are healthier than the Kalanchoe and require less sunlight. So, I can’t see too much sunlight being a reason for the problem.
Plants need the proper amount and kind of food, water, soil and light. Google can find specific info. I would repot after pruning severely and double check the requirement.