Is it normal for Sidekiq to be idle? New to Discourse, unsure if something's wrong

I’m self-hosting Discourse on a VPS at Vultr.
No CDN or proxy like Cloudflare is configured — at least nothing I’ve intentionally set up. It should be a fairly standard setup with just NGINX as the web server.

Everything else seems to be working fine — Sidekiq is running (shows as idle, but graphs update), notifications arrive, and chat works.
The only odd thing is that the red “last visit” line appears in exactly the same spot for all users, which seems like it shouldn’t happen.

Is there anything that could cause that on a fresh install? Maybe something related to how sessions or visit tracking is initialized?