Kalanchoe Flower Dying. IMO your plant is suffering from both lack of light and too much moisture - the outside pot the cache pot is quite snug around the plastic one water collects in the bottom of it and gets reabsorbed back making it to sit with wet feet. 01072020 Root rot often occurs when plants are allowed to sit in wet conditions due to over-watering or soil that does not drain well.
The plant then goes into a recovery phase where it is nothing but leaves for a while and then repeats flowering. To save an overwatered Kalanchoe start by forgoing irrigation that is stop watering it and check if it is necessary to switch to a better mixture of soil. 04082020 If your calandiva looks like its dying due to over-watering you may need to replace the potting medium with a fresh sterile one.
If the idea of a succulent dying after its flowers bloom is off-putting let it be known that Kalanchoe daigremontiana is a succulent plant that is very easy to grow.
Lots of time for plant to recuperate. Kalanchoe sounds like a good choice for your location. Then use standard pruning shears to trim the flower stalks back to the 2nd or 3rd leaf. How do you revive a dying Kalanchoe.