I have created a secondary account in this instance and soon realized I was having issues with posts displays. Curiously, I wasn't able to see any of the admins and several communities I browse with my main.

At first I though this was something about updating my settings or the account being too 'new', but I soon realized that several people have been posting with different language settings and that the default "Undetermined" is acting as a filter.

This is what the Community looks like when I have "Undetermined" on

https://iili.io/HisFQrQ.jpg

And this is when I select "English"

https://iili.io/HisfNUl.jpg

Both Ada and Kaity can't be seen in the first mode, and I assume the same would go for anyone that uses the same setting as them.