Looping multiple times on one relationship in document templ

Hello, We are experiencing some issues when generating documents from a document template. It all works fine, except for one case which is the following :

Diplomas of type A : 

{!#LOOP_BEGIN.R53941339#53943550}

   {!R53941339.diploma} - {!R53941339.diploma_level#value}

{!#LOOP_END.R53941339}



Diplomas of type B :

{!#LOOP_BEGIN.R53941339#55941716}

   {!R53941339.diploma} - {!R53941339.diploma_level#value}

{!#LOOP_END.R53941339}

When looping on the same relationship more than once in the document, only the first "loop_begin" works properly. The following "loop_begins" only print a single record and skip the others. When there are multiple records, I noticed that the document is all blanked at some point. We need this feature to be able to loop twice on a relationship, using a different view on the second loop. This has been tested using a Word(.doc) document template. We are not looping threw a lot of records. Even when there are about 4 or 5 records i