PDF file exported from Indesign can be searched for letters but not numbers in Acrobat

i @ moment stumped … have client whom i've created 200+ pages product catalog in indesign (a collection of 20+ indesign documents placed "master" document , layered page numbers , headers), , exported pdf. require file searchable article numbers.

 

here interesting result:

the file searchable, results searches letters, i.e. can search "stackable" , locations of "stackable" in pdf. can *not* search numbers, search returns "not found in document". exception year number (2016) turn page 40 (which halfway correct - there, it's in footer of every page of pdf it's not reported …)

 

i can search , find in pdf using other viewers (e.g. apple’s preview), that's not option client.

all text inside pdf "normal" text, can select , copy/paste no problem.

but: if select number , copy text editor, utf-8 representation of number, e.g. character(x89) becomes "c2 89" instead – guess may cause oddity. affects numbers, apparently.

what i'm wondering if there way fix it, or convince acrobat build search index includes numbers "human-searchable"?

 

i've narrowed down "place indesign doc inside indesign doc" being cause encoding problem, i'm still hoping hint/idea not boil down "rebuild catalog scratch, use intermediate pdf files , add layer of complexity/risk project" …

 

thank taking time read :-)

-markus

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