I wonder if that part was expected or if something broke down. Strange to go to all the work of planting a seed and creating the proper environment with light routing knowing that it will last only a single lunar day.
Seems likely that the insulation or power system did not work as designed.
I'd suspect it's a "tack on" experiement. They were doing a bunch of experiments and wanted to see if a plant could even germinate in a low gravity environment. Now that they know it can germinate, it is worth the money to see if i t could last longer.
