i have had this problem recently on my server.
over time contents of other peoples extra inventories got deleted

hopefully this can be fixed

Can you provide more information about your server? e.g: Minecraft version, Origins version, other mods installed, datapacks installed, etc. since it's pretty vague as currently described

i believe i found the issue. i got help in the discord server and someone that has made a custom origin in my server had the replace inventory function so i believe it shouldnt happen anymore. if it does happen again without the origin enabled i will inform with more information