I've created a scheduled automation that sends out a report. Everything is working as expected except for {{issue.Request Type.requestType.name}}. Excerpt of usage shown below:
{{#lookupIssues}}
<tr>
<td><a href='{{url.customer}}'>{{key}}</a></td>
<td>{{summary}}</td>
<td>{{issueType.name}}</td>
<td>{{issue.Request Type.requestType.name}}</td>
<td>{{priority.name}}</td>
<td>{{status.name}}</td>
<td>{{reporter.displayName}}</td>
<td>{{created.jqlDate}}</td>
<td>{{project.name}}</td>
</tr>
{{/}}
And for the record, yes, Request Type is filled in for all issues returned from that query.