verify dovecot 2.3.19.1 + fts_tika + tika-server 2.4.1 attachment scanning?

debugging a reproducible tika-server fail with fts_tika has proved a bit challenging, upstream

1st Q: can anyone _here_ verify successful (no error/fail) PDF attachment scanning using

dovecot 2.3.19.1 + fts_tika, with tika-server 2.4.1

?

i'm seeing issues with any/all PDF attachments.

this one, from smallpdf.com,

"Get_Started_With_Smallpdf.pdf"
DL @: https://ufile.io/dkew7k0u

is the/a sample that reproduces the problem