Solution:
Remove all ampersands from the source
XML and re-add them once the conversion is done.
- Open the source XML in a text editor of your choice (i.e Notepad, Wordpad, Notepad++, etc.) and use Find and Replace (usually reachable with [Ctrl]+[H]) to replace all occurrences of
&
with AMPERSAND
- Run the conversion as usual
- Open the target XML and use Find and Replace to replace
AMPERSAND
with &