Murena Email does not show second level folders

Summary

The problem

Steps to reproduce

If you create an extra folder for example under: sent>folder1>folder2 ,that second level folder does not appear in Murena theme of Murena Email. It does appear in other themes, and it does appear as a folder.

What is the current behavior?

Second level folder not shown

What is the expected correct behavior?

Should be shown

Technical informations

Relevant logs (adb logcat)

Relevant screenshots

Solutions

Workaround

Switching to another theme, then switching back to Murena theme may fix the issue.

Possible fixes