That might make a difference, but it shouldn’t.
The reason I asked about other filters is because Include filters exclude everything else, and Exclude filters include everything else. It always seemed a little backwards to me, and I’ve seen others on the forums that get confused by the way it works.
If you didn’t have any other filters on that rule though, I’m not sure why it wasn’t working. It looks like it should work based on the screenshots you provided and your sample message. The only other thing I could think of is perhaps a previous rule that either stops processing the messages, or handles the messages in the same way that your using to verify that your current rule is not working.