when you use a textarea with a
cam-variable-name attribute, make sure that there is no whitespace between the opening and closing tag. In your example there is a newline, which is treated as default value for the textarea. When there is already a default value for the textarea, the value specified in the
cam-variable-name attribute will not be applied in order to not overwrite this default value.
To fix this remove the whitespace or use a self-closing tag
<textarea ... />
Does this help you?