What device is this on? My iPhone on 16.4.1 is handling the links fine. I'm upgrading to 16.4.5 to test now.
No VPNHaven't come across this on 16.5 as yet with LTE, nor WiFi. VPN perhaps?
Turn off WiFi on the phone to force mobile data; any change?
Seen this at random times on other sites. Swipe-quit the browser and or reboot the device. Really messed up state of the browser/WebKit for browser being used.
ADD: or can try Settings > Safari > Advanced > Website Data, then search for "macrumors". Swipe-delete the item to clear cache/cookies for the site. Will need to sign in again.