This problem has occurred on my server since many updates ago, probably 6 months or more. It seemed to get better with 1.20.64, slow to load through nether portals but did not crash the server. But since updating to 1.20.73, the crashes have started occurring again. Previous to 1.20.64, the crash would cause me to be at the entrance portal's coords in the dimension I was meant to be exiting to, so e.g. I go into portal in overworld at 100 64 2000, and end up on relog in the nether at 100 64 2000. Now when the server crashes it just takes me back in time by 30 seconds or so. CPU jumps to 700%, sometimes it will crash, other times is just takes ages to load as others see. Cannot replicate on single player world when use downloaded copy of the world and some portals perform better than others with varying levels of builds on either side of the portal. Server is hosted through Nodecraft, performance other than this portal issue is very good. Can answer questions if more info required.
AusCatDad
This problem has occurred on my server since many updates ago, probably 6 months or more. It seemed to get better with 1.20.64, slow to load through nether portals but did not crash the server. But since updating to 1.20.73, the crashes have started occurring again. Previous to 1.20.64, the crash would cause me to be at the entrance portal's coords in the dimension I was meant to be exiting to, so e.g. I go into portal in overworld at 100 64 2000, and end up on relog in the nether at 100 64 2000. Now when the server crashes it just takes me back in time by 30 seconds or so. CPU jumps to 700%, sometimes it will crash, other times is just takes ages to load as others see. Cannot replicate on single player world when use downloaded copy of the world and some portals perform better than others with varying levels of builds on either side of the portal. Server is hosted through Nodecraft, performance other than this portal issue is very good. Can answer questions if more info required.