Lately, after a node upgrade to a higher version (1.30.1), my Block-Producing (BP) node will "stay" in the "start" phase for about 45 minutes making a strange loop by switching to synchronization mode and then immediately going back to the "start" phase.
[2021-09-30 03:17:34.14 UTC] Replayed block: slot SlotNo 40283991 of At (SlotNo 40321032)
[2021-09-30 03:17:37.33 UTC] block replay progress (%) = 100.0
[2021-09-30 03:17:37.72 UTC] before next, messages elided = 40284006
[2021-09-30 03:17:37.72 UTC] Replayed block: slot SlotNo 40305522 of At (SlotNo 40321032)
[2021-09-30 03:17:37.72 UTC] Replayed block: slot SlotNo 40305529 of At (SlotNo 40321032)
[2021-09-30 03:17:40.52 UTC] block replay progress (%) = 100.0
[2021-09-30 03:17:40.58 UTC] before next, messages elided = 40305616
[2021-09-30 03:17:40.58 UTC] Replayed block: slot SlotNo 40321032 of At (SlotNo 40321032)
[2021-09-30 03:17:40.58 UTC] Opened lgr db
I'm running my node on a 8GB RAM Ubuntu LTS with 4 vCPUs. Any thought anyone?