A couple of weeks ago, my filters stopped working. I tried redoing each of them, but still they don't work as they used to. I had made no changes before the time they stopped working. If you apply the filter manually, it works, but not for incoming email.

In addition to this, around the same time, the search function stopped working correctly. For example, searching for Amazon emails in one particular folder yielded no results, even though I could see the emails in there. Once I move the messages to another folder, the search starts finding them again.