Again in the Night the Rig close down SGMiner
23:21:05] NH x15 multi extranonce change requested
[23:21:05] NH x15 multi difficulty changed to 0.100
[23:21:08] Accepted Coin 182 Diff 0.113/0.100 GPU 1 at NH x15 multi
[23:21:12] Accepted Coin 182 Diff 0.892/0.100 GPU 2 at NH x15 multi
[23:21:30] Accepted Coin 182 Diff 0.330/0.100 GPU 0 at NH x15 multi
[23:22:14] Accepted Coin 189 Diff 0.112/0.100 GPU 5 at NH x15 multi
[23:22:26] Accepted Coin 189 Diff 0.171/0.100 GPU 5 at NH x15 multi
[23:22:55] Accepted Coin 189 Diff 0.306/0.100 GPU 0 at NH x15 multi
[23:23:16] Accepted Coin 189 Diff 1.319/0.100 GPU 1 at NH x15 multi
[23:23:26] Accepted Coin 189 Diff 9.627/0.100 GPU 0 at NH x15 multi
[23:23:41] NH x11 multi alive, testing stability
[23:23:41] Accepted Coin 176 Diff 0.394/0.100 GPU 5 at NH x15 multi
[23:23:49] NH x11 multi stable for 30 seconds
[23:23:49] Switching to NH x11 multi
[23:23:54] Stratum connection to NH x11 multi interrupted
[23:23:54] NH x11 multi not responding!
[23:23:54] Switching to NH x15 multi
[23:24:50] thread was not cancelled in 60 seconds after restart_mining_threads
[23:24:50]
Summary of runtime statistics:
Dont know why it closed. SGminer didnt try to get on the Backup Pool

I'm on the latest sgminer5 version available on PiMP and I'm getting similar stratum disconnects using the auto-switching TMB ports. I have setup a cron job to reboot every 6 hours as a workaround but the issue still randomly happens. I have lowered clocks but this seems to have no impact whatsoever.
Anyone aware of this? Is it a Sgminer issue or TMB? It seems from previous posts that it probably is the former.