I have a stack with 5 x450e-48p switches. Back in January I replaced slot 3 due to it failing and all was good after that. A couple weeks ago slot 3 failed again so I replaced the switch and all was good until this past Friday when it started randomly resetting itself. I don't want to replace the switch again as I don't know if that is the issue. Could a bad stacking cable or module cause this? It is running on an older firmware of 220.127.116.11, could that be causing it?