I created the automation with those orders:
1. Re-fetch work item
2. Else-if: if email domain LinkedIn.com -> edit Source: Linkedin
2. Else-if: if summary/subject contains referred or referral or reference -> edit Source: Referral
4. Else-if: subject contains ''website'' -> edit Source: website
5. Else → Source = Email
But the automation failed at step 2. It could not recognize the keywords. Here is my automation setup for step 2.

Please help to check this
Thank you