Simscape electrical thermal analysis

hi in short, i am trying to monitor the surface temperature of a capacitor for a DC bus filter:

i would've thought this would work but all i get is 300K which is odd because my temperature reference points are set to 40degC

the thermal characteristics are all parameterised based on a capacitor datasheet.

if i change the thermal probe to differential it shows me -286K which as we all know is impossble so i dunno what was happening there...

does anyone have experience trying to get temperature rises from capacitors in simscape electrical? am i missing something here?

[Seth]

for some added context, what i want to see is if the three capacitors split the thermal losses evenly, and if one capacitor dies, do the others heat up more by an unacceptable amount with the same load and current