Strange. I'll have to look into this.
Thanks for letting me know!
If you don’t have access to Apple devices, I find Epiphany/GNOME Web to be a pretty good proxy—it uses WebKit, unlike most things these days that use Blink. Most times, Safari issues appear in Epiphany as well. This seems to hit a TypeError in https://svader.vercel.app/_app/immutable/chunks/entry.B0k4a9... line 1, column 9932 (Xe(ht,e)), and I have no time to investigate further.