Need some help here, I upgraded to Pi-hole v5.1.2 recently and ran into a odd issue.
My groups have all vanished in the WebUI, I still can see them in the Shell and they still block and filter. I also cannot whitelist any new domain at all. Do I have a DB corruption issue going on here?
Next question. When you delete a ad server, does Pi Hole purge all the entries from that list it pulled from? and if not, can you just purge the whole active list and re-download the lists?
The entries are removed the next time you run a gravity update manually or during the next automatically scheduled gravity update (every Sunday morning).