I am hitting a maximum # of chars - or some limiting factor - in a Multiline field

I am hitting a maximum # of chars - or some limiting factor - in a Multiline field

I am cutting from Word docs and pasting large amount of text into a Multiline field.   Most records display just fine - but some of the larger bodies of text are not fully displayed, the text being cut off mid-view.   Since I note that the FAQ's claim there is no limit to the number of chars in such a field, I wonder what could be causing this? 

Many thanks for help.