random pieces of note text missing when I print to PDF

When I print my diagram as a PDF, the text in a note:

"SUMMARY: The core of this metadata model includes "data_set"s, different "data_table"s of that data set, and then for each table, the set of "variable"s it contains.  Variables exist independent of data tables, so the same variable definition can apply to multiple tables (over years where a survey remained the same, or across surveys with different names).  For each variable, you can specify a set of valid values.  You can also specify when two variables are related and basic information on how to translate between the two.  In addition, there is space to group data set collections (one of these groupings could be the set of tables included in a production process, for example) and variables independent of ("variable_group") or within ("table_variable_group") a table."

consistently turns into:

SUMMARY: The core of this metadata model includes "data_set"s, different
"data_table"s of that data set, and then for each table, the set of "variable"s it
contains. Variables exist independent tables, so same variable definition can apply
to multiple tables (over years where a survey remained same, or across surveys
with different names). For variable, you specify valid values. You also specify when
two variables are related basic information on how translate between two. In
addition, there is space group collections (one these groupings could be included in
production process, example) ("variable_group") within ("table_variable_group")
table.

Words from the original text are seemingly randomly missing, causing the text to turn into something that sounds like a garbled mess.  Any idea why this would be happening?  Is it something in my text that I might be able to alter to fix?

Thanks,

Jonathan Morgan