I’ve been using it for a while too, and… yeah, that’s about right.
This is definitely a side effect of Lockdown.
If it was some Ars articles recently, comment threads indicated that it was broken for everyone on mobile.
I would be inclined to put some of that up to the reduced font support - someone made the website pixel perfect with their fonts, and it breaks a bit with the standard ones, but I’m not sure anymore…
You can disable Lockdown on a per-site basis if you want to experiment - it’s in the settings for the website menu to the left of the URL.