Network loss after 24hrs on Docker LXC

Fine folks of c/selfhosted, I've got a Docker LXC (Debian) running in Proxmox that loses its local network connection 24 hours after boot. It's remedied with a LXC restart. I am still able to access the console through Proxmox when this happens, but all running services (docker ps still says they're running) are inaccessible on...