I'm using a small HP Elitedesk mini G1 with 8GB ram running a bedrock server on Ubuntu server 20.04. RAM usage has always been fairly minimal, but recently the RAM usage rises steadily until stable at 7.4GB, when I then try to connect with either my PC client or from Android, the server crashes with the last entry in the log reading '<user> connected'.

I restored an earlier backup of my world and was then able to connect, but when I disconnected and then tried to reconnect the server crashed again and every time afterwards.