Redirects are cached

It seems like the shorturl service send redirects such that browsers cache the result and do not trigger requests anymore, making changes to existing short-urls somewhat effectless.

λ ~/ curl -I https://fsmpi.eu/sprechstunde
HTTP/2 301 
server: nginx/1.18.0
date: Sun, 17 Apr 2022 15:12:55 GMT
content-type: text/html; charset=utf-8
content-length: 314
location: https://tickets.fsmpi.rwth-aachen.de/fsmpi/hoern-22q2/
strict-transport-security: max-age=15768000
x-xss-protection: 1; mode=block
x-content-type-options: nosniff
referrer-policy: same-origin
expect-ct: max-age=86400, enforce
x-frame-options: DENY
content-security-policy: script-src https://cdn.fsmpi.rwth-aachen.de 'self'; frame-ancestors 'none'

Apparently, as StackOverflow states, "In the absense of cache control directives that specify otherwise, a 301 redirect defaults to being cached without any expiry date."