Trying to make an HTML Note update for @WithKnown. Sometimes use just need a box for plain text. Wondering if this is the reason micropub clients can'

Trying to make an HTML Note update for @WithKnown. Sometimes use just need a box for plain text. Wondering if this is the reason micropub clients can't publish notes:

"Apart from the htmlspecialchars() and (int) parts, it should be obvious what this does. htmlspecialchars() makes sure any characters that are special in html are properly encoded so people can't inject HTML tags or Javascript into your page."

htmlspecialchars() Is this getting in the way? Totally understand why you should have it....well I learned about three seconds ago...so totally is a little strong...