ICX 7250 stack switches rebooting

I updated to 8090 UFI on my ICX 7250s in most of the stacks unit 1 stays up but units 2 and 3 show that the have restarted sometime recently. Found this because my AP report disconnected but the monitor still thinks the stack it still up.Just a few examplesSTACKID 1  system uptime is 48 day(s) 22 minute(s) 54 second(s)STACKID 2  system uptime is 2 day(s) 5 hour(s) 22 minute(s) 36 second(s)The system started at 19:24:38 Pacific Mon Jul 01 2019STACKID 1  system uptime is 37 day(s) 8 hour(s) 1 minute(s) 28 second(s)STACKID 2  system uptime is 12 hour(s) 36 minute(s) 56 second(s)The system started at 11:22:29 Pacific Fri Jul 12 2019STACKID 1  system uptime is 37 day(s) 4 hour(s) 51 minute(s) 34 second(s)STACKID 2  system uptime is 6 hour(s) 16 minute(s) 52 second(s)STACKID 3  system uptime is 6 hour(s) 16 minute(s) 51 second(s)STACKID 1  system uptime is 37 day(s) 5 hour(s) 5 minute(s) 7 second(s)STACKID 2  system uptime is 11 day(s) 15 hour(s) 42 minute(s) 16 second(s)The system started at 13:51:51 Pacific Fri Jul 12 2019