pdftotext removing "fi" from a recent pdf I made with latex,

[Mike Marchywka]

I have never seen this before but looks like a stupid font problem
but it likely to be common with many pdf's now. If I just run 
"pdftotext" on my output, I get weird boxes where each "fi"
is. If I used "-enc ASCII7" the entire thing is deleted.

I could probably create a minimal working example but thought someone
may know offhand. Thanks. 

This is the version,

pdftotext -v
pdftotext version 0.41.0
Copyright 2005-2016 The Poppler Developers - http://poppler.freedesktop.org
Copyright 1996-2011 Glyph & Cog, LLC

and basic info on the pdf file,
exifutil -list vitaprop.pdfExifTool Version Number         : 11.75
File Name                       : vitaprop.pdf
Directory                       : .
File Size                       : 287 kB
File Modification Date/Time     : 2019:11:23 06:17:53-05:00
File Access Date/Time           : 2019:11:23 06:17:53-05:00
File Inode Change Date/Time     : 2019:11:23 06:17:53-05:00
File Permissions                : rw-rw-r--
File Type                       : PDF
File Type Extension             : pdf
MIME Type                       : application/pdf
PDF Version                     : 1.5
Linearized                      : No
Page Count                      : 12
Page Mode                       : UseOutlines
Author                          : 
Title                           : 
Subject                         : 
Creator                         : LaTeX with hyperref package
Producer                        : pdfTeX-1.40.16
Create Date                     : 2019:11:23 06:17:52-05:00
Modify Date                     : 2019:11:23 06:17:52-05:00
Trapped                         : False
PTEX Fullbanner                 : This is pdfTeX, Version 3.14159265-2.6-1.40.16 (TeX Live 2015/Debian) kpathsea version 6.2.1


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mike marchywka
306 charles cox
canton GA 30115
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marchywka at hotmail.com
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ORCID: 0000-0001-9237-455X