Sorting a community by top displays pinned posts from the entire fediverse

### Bug Description

On a piefed account (not reproducible with lemmy), visit any community and sort by top (all time). A variety of posts from unrelated communities will show up. 

### Expected Behaviour

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### Steps to Reproduce

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### Additional Context

_No response_

### App Version

_No response_

### Device

Pixel 9a

### OS

Grapheneos 