For starters, please use the Canary client as described in #736 for client bug testing on desktop. Second, however, this does not seem like a bug with the client itself, but with the backend. Could you share the ID of the community in question? You should be able to find it by pressing & holding on the community icon on mobile and choosing "more options," and in the sheet that opens, scroll to the bottom, and select "copy community ID."
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Comment by Hampus