Add Tags to Contacts without overwrite [Bigin]

[meetab]

Thanks.

What I don't understand (see image below where I have highlighted the fields) is that, despite setting the value of the “Append Values” field to “true,” when I enter a new value in the custom field (of type Multiselectpicklist), the previous values are removed. Shouldn't it append?

With this action I'd like to add a new option in that field, not overwriting the existing values.

Thanks.