Yeah, it’s a known issue, but I don’t know if anybody’s working on it. There are a couple of existing threads in different parts of the forum about it. I’m not sure if this is an issue with the app or the platform. 
BTW, 122 degrees Fahrenheit equals 50 degrees Celsius, so that’s probably where the limit number comes from. But it’s still way too low for home automation. It’s true that 50°C is a reasonable max limit for most battery operated devices, but not for mains powered.
Max settable temperature is 50 degrees?
@samsungzell might know who to report this issue too.