I think this might've started happening after I set a custom DNS (Adguard) a couple days ago, but I have since removed the DNS and upgraded OpenWRT (without setting transfer), yet it's still happening.
When I log into Web UI, it just says "Status" with a "Refreshing" sign in the top-right corner until I refresh the page.
The interface returns after I refresh, but the "Refreshing" sign is still there, even if I go to other sections.
That is normal and expected behavior. That indicates that the page is constantly auto-refreshing the content -- on mine, the refresh rate appears to be about 5 seconds.
I seem to recall a way to disable this, but I don't remember where to find that.
The same happens for me occasionally after a new install (empty status page that requires a refresh to show), itās always been solved by clearing cookies and cache, so you might give that a try.