Aha I know what’s the problem now.
Hashtags at the end of LinkedIn posts must use this format:
{hashtag|\\#|digitalmarketing}
In your case it has to be
{hashtag|\\#|digitalmarketing} {hashtag|\\#|copywriting} {hashtag|\\#|cro} {hashtag|\\#|productivity} {hashtag|\\#|webdesign}
Originally discussed on #Hashtags— I cannot escape the "#" symbol