text: Title: --test-filter works but not with a normal execution
  Body: I just set up urlwatch with 4 urls.
  My first one went great, and also the second one, here is my urls.yaml:
  ```
  name: "Ransomfeed"
  kind: url
  url: "https://www.ransomfeed.it/?country=ITA"
  filter:
    - xpath: "//div[@class='table-responsive']//tbody/tr[1]"
    - html2text
    - strip
  
  ---
  
  name: "Hacker News"
  kind: url
  url: "https://thehackernews.com/"
  
  filter:
    - xpath: "//div[@class='body-post clear'][1]"
    - html2text
    - shellpipe: "tr -cd '\\11\\12\\15\\40-\\176'"
    - strip
  
  ---
  
  name: "Red Hot Cyber"
  kind: url
  url: "https://www.redhotcyber.com/"
  filter:
    - xpath: "(//article[contains(@class, 'elementor-post')])[1]"
    - html2text
    - strip
  
  ---
  
  name: "Commissariato di PS Notizie"
  kind: url
  url: "https://www.commissariatodips.it/notizie/index.html"
  filter:
    - xpath: "//div[@class='media article articletype-0 topnews dotted-h'][1]"
    - html2text
    - strip
  
  
  I just want to use urlwatch for when specific sites publuish a new article.
  ```
  The thing is, that this 4 urls that I set up they all pass the test:
  
  
  ```
  user@ubuntu:~$ urlwatch --test-filter 1
  16078
  2024-06-24
  				15:33:25
  				Compagnia Trasporti Integrati S.R.L
  				monti
  				Italy
  user@ubuntu:~$ urlwatch --test-filter 2
  New MOVEit Transfer Vulnerability Under Active Exploitation - Patch ASAP!
  Jun 26, 2024
  Vulnerability / Data Protection
   A newly disclosed critical security flaw impacting Progress Software MOVEit Transfer is already seeing exploitation attempts in the wild shortly after details of the bug were publicly disclosed. The vulnerability, tracked as CVE-2024-5806 (CVSS score: 9.1), concerns an authentication bypass that impacts the following versions - From 2023.0.0 before 2023.0.11 From 2023.1.0 before 2023.1.6, and From 2024.0.0 before 2024.0.2 "Improper authentication vulnerability in Progress MOVEit Transfer (SFTP module) can lead to Authentication Bypass," the company said in an advisory released Tuesday. Progress has also addressed another critical SFTP-associated authentication bypass vulnerability (CVE-2024-5805, CVSS score: 9.1) affecting MOVEit Gateway version 2024.0.0. Successful exploitation of the flaws could allow attackers to bypass SFTP authentication and gain access to MOVEit Transfer and Gateway systems. watchTowr Labs has since published additional technical specifi
  user@ubuntu:~$ urlwatch --test-filter 3
  Cybercrime e Dark Web
  150.000 dollari. Il costo di uno 0-Day UAF nel Kernel Linux sul Dark Web
  Recentemente è emerso un allarme nel mondo della sicurezza informatica: un attore malintenzionato ha annunciato la vendita di una vulnerabilità 0-Day di tipo Use After Free (UAF) nel kernel Linux su un noto forum del dark web. Questa vulnerabilità, se sfruttata, permetterebbe l’esecuzione di codice con privilegi elevati, rappresentando una
  RHC Dark Lab
  26/06/2024
  16:20
  user@ubuntu:~$ urlwatch --test-filter 4
  25.06.2024
  													POLIZIA DI STATO E ANCI PIEMONTE: PATTO PER LA CYBER SICUREZZA
  													 È stato siglato presso la Questura di Torino il Protocollo d’Intesa tra il Centro Operativo Sicurezza Cibernetica della Polizia Postale Piemonte e...
  
  ```
  But only the first and the third one actually send me something to discord(I used a discord webhook for reporting)
  And also the console shows this:
  ```
  user@ubuntu:~$ urlwatch
  ===========================================================================
  01. NEW: Commissariato di PS Notizie
  ===========================================================================
  
  ---------------------------------------------------------------------------
  NEW: Commissariato di PS Notizie ( https://www.commissariatodips.it/notizie/index.html )
  ---------------------------------------------------------------------------
  
  
  -- 
  ```
  And this is what I got from Discord:
  ```
  ===========================================================================
  01. NEW: Commissariato di PS Notizie
  ===========================================================================
  
  ---------------------------------------------------------------------------
  NEW: Commissariato di PS Notizie ( https://www.commissariatodips.it/notizie/index.html )
  ---------------------------------------------------------------------------
  
  
  -- 
  urlwatch 2.28, Copyright 2008-2023 Thomas Perl
  Website: https://thp.io/2008/urlwatch/
  Support urlwatch development: https://github.com/sponsors/thp
  watched 4 URLs in 0 seconds
  
  ```
  I don't know if I am missing out on something important but I can't seem to figure out the issue by looking at the wiki