Item Detection Filter emptied with server restart

[jag989]

I'm setting up a tesla coil that relies on an item detection filter, but I've been running in to trouble.

Whenever the server restarts, any item I've placed inside the filter is lost. The filter is always empty once the server is running again.

I initially thought it was an issue with the chunk unloading, but it I've double and triple checked that this wasn't the case. There is both a dimensional anchor and chunk loader within range of the filter.

Is this a known bug, or better yet, is there a workaround to keep the filter from erasing items?

Thanks!