Would you please provide more details? Such as what command or tool are you using to get a certificate?
Currently that domain uses a wildcard certificate from Sectigo not Let's Encrypt.
I see you have many Let's Encrypt certs both wildcard and non-wildcard. You must use a DNS Challenge for the wildcard but the others could use a different method like HTTP Challenge. If using HTTP Challenge there may be problems because your domain redirects HTTP Challenge tests to a different website.
What services does infomaniak provide for you? Are you using one of their tools to get the certificate?
curl -i http://glpi.hrc-environnement.com/.well-known/acme-challenge/Test404
HTTP/1.1 302 Found
date: Thu, 31 Jul 2025 16:43:49 GMT
server: Apache
location: https://ssl-challenges.infomaniak.com/acme-challenge/Test404
The certificate used by that domain right now
echo|openssl s_client -connect glpi.hrc-environnement.com:443 | head -20
0 s:CN = *.hrc-environnement.com
i:C = GB, O = Sectigo Limited, CN = Sectigo Public Server Authentication CA DV R36
a:PKEY: rsaEncryption, 2048 (bit); sigalg: RSA-SHA256
v:NotBefore: Jul 17 00:00:00 2025 GMT; NotAfter: Aug 17 23:59:59 2026 GMT