Issue when opening modal for custom repeats when already in a modal

Hi,

When using this module to create a custom date repeat from a modal frame it closes the mail modal frame and opens a new one.
Data gets lost.
Steps to reproduce:

• Create content type with recurring date field
• Create link to open 'Add node' page in a modal frame

<a class="use-ajax" href="/node/add/[conten_type]" title="Add item" data-dialog-type="modal" data-dialog-options='{"height":"auto","width":"50%","max-height":"100%"}'>Add item</a>

• Click link to create new item. Opens in modal frame.
• Select 'Custom...' from date repeat options. Original modal is closing. New modal with repeat options is opening.
• When submitting, there's no node add form to return to.

Any ideas on how to fix this issue?

Thanks in advance.