My Antminer S19J pro suddenly goes inactive in Antpool, after working for exmaple 1 hour. It is showing Normal state also the ethernet cable shows connected and everything seems alright. And also once it hoes offline I cannot login in the Antminer admin page anymore. Then I have to factory reset , fill again the 3 pool's settings and afer 15min it goes active in the pool. What can be the problem?