The thread of the bug report I submitted reveals that SDF is not /expressly/ blocking thelemmy.club, at least not transparently. So this leaves these possibilities:

• opaque secret blocking of thelemmy.club perhaps using a firewall
• community-specific blocking that suppresses both Android and mildlyinfuriating
• software defect

After SDF was down for ~9 months, it never fully recovered from the re-opening. So possible there is some obscure software defect related to federating.

If it’s the 1st bullet, I would say it’s likely intentional… but not necessarily. If, for example, thelemmy.club had a local user with shared IP attacking or annoying SDF in some way, SDF would perhaps block the IP not realising that thelemmy.club uses the same IP.