Why can't I see a specific post in !caps@lemmy.world from lemmy.ml when the same post is visible on other instances? [SOLVED]

EDIT: After discussing this on Matrix, I believe the answer is in the mod logs. The author of the post in question was issued a temporary ban in another community on lemmy.ml, which I suspect is affecting the display of this user’s content across all of lemmy.ml even though the post in question is in a different community from the one that issued the ban (which is kinda screwy tbh).

Description of the problem

The last several months, I've been trying to build up the community over at !caps@lemmy.world. It's going mostly well, but one thing that has me scratching my head lately is that when I'm browsing from lemmy.ml (i.e. https://lemmy.ml/c/caps@lemmy.world), which is 99% of the time, I can't see the most recent post. Oddly enough, the author is also from lemmy.ml, and I have previously interacted w/ the same user in the comments of older posts, so I know it's not a user-specific issue. I've double checked my profile settings and haven't blocked the community, instance, or user. This issue seems specific to lemmy.ml because I can see it when I browse to the community from other instances.

Any ideas why this could be happening and what I can do to resolve it? Thanks.

Steps to reproduce the issue

• Visit https://lemmy.world/c/caps and sort by Active or New. You'll see a post called "Thanks for the chats guys" with one comment.
• Visit https://lemm.ee/c/caps@lemmy.world - again, the post is visible.
• Now head over to https://lemmy.ml/c/caps@lemmy.world and look at the feed.

Actual result

The post is not there.

Expected result

The post should show up in the feed.