can't process (named) pipe

[setop]

$ teip -og '([0-9]{1,3}\.){3}[0-9]{1,3}' -- sed -n 'i@@@.@@@.@@@.@@@' < test_secure

works

$ teip -og '([0-9]{1,3}\.){3}[0-9]{1,3}' -- sed -n 'i@@@.@@@.@@@.@@@' <(gzip -cd test_secure.gz) 

freezes

but

$ gzip -cd test_secure.gz | teip -og '([0-9]{1,3}\.){3}[0-9]{1,3}' -- sed -n 'i@@@.@@@.@@@.@@@'

works

---

$ file <(gzip -cd test_secure.gz) 
/dev/fd/63: symbolic link to pipe:[52260780]

$ file -L <(gzip -cd test_secure.gz) -
/dev/fd/63: fifo (named pipe)

$ cat /etc/debian_version 
12.6

$ teip --version
teip 2.3.2

$ ldd $(which teip)
        statically linked