Conservation of Energy Question

[Bijan Mehdizadeh 1B]

I remember one of my family members asking me this question, but I forgot the answer and am quite curious to what it may be. The question was, if you have a spring, and you compress it, and then put a rubber band over it to keep it compressed, and then you throw it into the fire, and it disintegrates, what happens to the stored energy inside the spring?

[Karan Thaker 2L]

The spring would release as the rubber band melts away I believe and the spring would release all its potential energy there. Not sure tho.