There are two related questions here which would be good to answer. One is what caused the body of your plant to go soft, and that may relate to care over time in the past. Two is what kind of treatment you should give your plant in the near future and beyond to aid its recovery. A week or two of healing in the shade is probably a good idea but from there on out more light and I do not recommend leaving these plants dry for very long this time of year.
The cycle you want to maintain in spring and summer is from very wet (water coming out the bottom of the pot) to almost dry (try to measure at depth because the surface dries out much faster). They do not like going all the way dry this time of year, which can happen surprisingly fast (again, depending on your mix and the exposure). If you wait too long to water on a regular basis, they will become cranky and may either lose leaves or stop generating new ones. This is generally reversible given observation and adjustment. Basically the good care of these plants involves fine-tuning the timing of that cycle so the plant stays in the zone during periods of active growth.
Rainfall is the best kind of water and I am a little jealous of those of you who get summer rain because we do not, and that can be the special sauce.
Another observation from experience is that rot situations (like the softening of the body of your plant) sometimes result from the plant lacking vigor to start with, which makes them more vulnerable to whatever thing causes the rot. In fact you can sometimes trigger rot by allowing the roots to dry out completely for too long then flooding them with water. (In other words, cause rot by underwatering, in essence.) These sorts of temperamentalities are something you often have to experience to understand, and that is what you're doing with the current situation. Just stay attentive and you can learn a lot from what the plant tells you down the road.
