Indexer parameters to Jackett error

I’m using linuxserverio Radarr docker app on Unraid, but the indexer seems to have stopped passing in parameters correctly to Jackett. Viewing the trace logs shows this:
This happens for 4 different indexers I’ve set up with through Jackett.

When I compare this to binhex Radarr which is working, it’s passing the categories correctly:

Any ideas how to fix this?