It appears that @mixphix has blocked @MangoIV. At least the user can't comment on any issue that was created by mixphix, such as
https://github.com/haskell/core-libraries-committee/issues/256 and github documentation suggests this is the case for blocked users.
This poses a problem with our process. I don't really care about peoples personal block lists, but it must not interfere with the proposal processes.
I suggest the user be unblocked or mixphix creates a separate CLC account and we document this as a requirement for at least CLC members.
It could still disrupt the process when non-members have block lists, but I guess that can't be solved easily, unless we move to moderated mailing list.