Weirdly, this only happens for me in Chrome despite using the same extensions there that I use in Firefox. I initially fixed the problem in both browsers by switching my DNS provider from Cloudflare to Quad9 (which also noticeably improved network performance more than I'd ever expect a change in DNS provider to do so), but then the problem returned in Chrome, and since Firefox is my daily driver, I haven't bothered to figure out why just yet.
Originally, it had something to do with how Archive.today handles Cloudflare's EDNS configuration. Now, though, it appears that it might be caused by something else.
See: https://en.wikipedia.org/wiki/Archive.today#Cloudflare_DNS_a...