Hello,
I have tried adding the exact code you posted to add the <p> HTML tag but it still strips it from the excerpt.
Any idea why?
I added the code at the end of the functions.php of my active theme.(I only have one theme installed anyways).
I have also checked the option for the HTML tags but it does not help.
Any idea?
How can I debug this to see where is the issue?
Cheers