"Missing Signature Fields" when sending document for initials - Request e-signatures

Hello,

I'm recieving this "Missing Signature Fields" error when preparing a document for e-signature. The issue arrises when I request only an Initials field (as some of my documentation requires), but not when a full signature field is requested.

I do not want to add an additional signature block to an additional page when it is not necesary for my purposes, I only want to request a single inital field on the document - however this doesn't seem like an option. 

Am I missing an option? Is this an oversight? Any help would be appreciated. 

Thanks!