Show merge field values in Inbox sent messages

Canned Email messages in Inbox support merge fields, but the merged values do not appear in the conversation history.

Please make this functionality match regular emails—so when I review the sent messages in the conversation, the merge field values (not the merge tags within [brackets] show up. 

This is helpful both for confirming that the message is reaching the recipient as intended—with merged values—and for knowing the contents of the message in case I want to see things like past spend, expiration date, or other fields. 

Thanks!