Strange phoenix is working on one rig after downgrading hiveOS and using an older version of phoenix. Same thing wasn’t working on the other rig so I’ve switched to teamredminer.
I had this issue and now it is fixed. I thought it was my USB drive (32GB) upgraded to M.2 SSD (120GB), but that’s not the issue, but it helped. Then I thought it was the miner software (phoenixminer) because the first error of OOM says to kill phoenixminer and it was using 18GB total-vm. It was crashing every 30min to 1 hour. So I switched to lolminer and no more issues.