Possible Bug in Acrobat Reader DC--Skipped spaces in field entries in0 fillable text fields

I have a 22 page document with many fillable text fields. Reader DC handles all entries without any problem. I added another page with fillable fields and invariably entries on the first page skip characters leaving blank spaces that cannot be filled by deleting the blanks or backspacing. Repeated attempts do not solve the problem. Is there a limit on the number of text fields? Is this a known problem? Does it occur when a set number of text fields is exceeded? Is there any other explanation? The document was created with Nitro Pro but no other document created with Nitro Pro has ever shown any of this kind of problem. In every respect the 22 page documents (and many other shorter documents) are filled in without any problem by Reader DC.

RT129