The statistics show “Blocked by filter,” but the name is blank.

I am using the free version of controld. I would like to change my DNS provider, but I am experiencing numerous problems, such as timeouts and inaccurate statistics. I have already contacted support and was told that if I have activated several third-party block lists and the domain is present in different block lists, the block list that blocks the domain may not be the one that was displayed, which I personally don't like.

But why do I see a filter without a name in the statistics where the filters are listed?