Hi! I just wanted to let you know that I solved the issue: I noticed that in activity monitor my kernel task was using more than 65% of my CPU and I discovered that this was due to CPU Throttle when the charge of the CPU was too much, so I tried TG pro to keep the fan at higher speed but same issue… then I found a post of a guy in OBS forum that had similar issue with kernel task and solved disassembling the macbook pro and cleaning the fans and the air filters, I did the same and now EVERYTHING WORKS PERFECTLY FINE!!
So in the end it was not really an issue of my macbook, just it needed clean air!! 
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