Was trying to use water streams to set up a storage system but noticed hoppers weren't picking up items from the water stream but it would only seem to happen on one part so maybe it has something to do with chunk borders as well I'm not too entirely sure but here's 2 videos -----https://drive.google.com/file/d/1nwb1MSiZp6eV_nCvtbFeoiH3uy50v4pg/view?usp=drivesdk

https://drive.google.com/file/d/1nzgnMAFVJWm_okPShB4Wh3cFhfPO4LCw/view?usp=drivesdk 

Sorry videos are now public