Sometimes when I start to use MacBook its cpu speed limit stays at 20% despite the low temperature. I use the app "HOT" to monitor it. Sometimes even when temperature is 60 Celsius cpu speed limit stays at 20%. Only after a reboot it gets to 100%. Or it takes a very very long time.It might be inactivity of half a day or a day. But cannot predict when it will be reset. Is there any reason for this? Or is is it a hardware fault. I have tried clean install of OS. NVRAM SCM ..etc all the resets. But issue stays the same. I have asked the same question here as well.