What's causes partially loaded tiling issue with LibreOffice online?

I have an integration of LibreOffice online with a document management system (Alfresco) where I serve the loleaflet in an iframe. Currently I have issue where the very very first page of a document (and only the first page) are partially rendered :

and stay that way unless a change id effected in the unseen region after which it is rendered:

In the second pic note that the top left is still missing a few tiles.
I would appreciate an insight into why this is happening.

Thank you all very much

I suppose you should ask developers at #libreoffice at FreeNode

It seems this issue was due to the version of LOOL I had installed.