Dedicated server only heartbeats periodically

I’m having an issue where my dedicated server doesn’t sustain heartbeat, resulting in a period of time where my server doesn’t show up on the server browser if they refresh, and it sending no information if the server is selected on the browser.
I’m tearing my hair off over this issue, and I have no idea why this is happening.

Here’s a screenshot of my server cfg, and my server command line.[/t]


Thanks for your time.

Bumping this for information: I’ve solved this problem by autorunning a lua file (serverside) that runs the heartbeat console command every tick. I hope whomever else has this problem is helped by this!