a Fediverse group - a.gup.pe/palestine - is shown on lemmy.ml, but does not send/receive with it.

I have just started using Lemmy and I love it.

I have had good results sending Lemmy posts to Masto, and vice-versa. One exception has been the above group shown in the title. In Masto, send/receive posts works fine, but the Lemmy version seems cut off from the rest of the Fediverse.

Could someone look into that? Thanks.