Firmware update v2.2.8 for my EverFrost 40 cooler

I was having issues cooling below 40 degrees Fahrenheit on my cooler. It had v2.2.3 installed and while troubleshooting the issue I saw v2.2.8 was available. I installed it and now the cooler appears to be working again. Is there anywhere I can go to see what the changes/fixes are for the latest version? I’m happy it is working, but would love to know if the firmware update was the solution or if I can expect the issue to return. Thanks!