Confused by filters

I’m running Duplicati (Duplicati - 2.0.3.11_canary_2018-09-05) on my Linux laptop. I created a job to backup “/home/frood”. I want to exclude the .cache subdirectory so I created an “Exclude Folder” filter and set it to “/home/frood/.cache”. The directory is still getting backed up.
I also tried excluding “.cache”, but that doesn’t work either.

What am I doing wrong?

Can you export your job “As Command-line” so we can see the actual parameters? (Be sure to remove any personal info like IP or email addresses, passwords, etc.)