Aluminum electrolytic capacitors have higher ESR at colder temperatures, and lower ESR at higher temperatures. That is my guess at what went wrong. They general

Aluminum electrolytic capacitors have higher ESR at colder temperatures, and lower ESR at higher temperatures. That is my guess at what went wrong. They generally perform better at higher temperatures (within reason), although a particular circuit may require the ESR to be within a certain range (don’t go randomly swapping out your capacitors for low-ESR capacitors, it may make the circuit unstable or destroy something).