I run in the CLI, latest version, compiled today from the REPO

hf mf fchk --1k <key1> <key2> <key3> <key4>

And get the green table with the checked keys.
Then I run

hf mf fchk --1k <key1> <key2> <key3> <key4> --export-dic test.dic

the file is created and contains the same keys
Finally i run

hf mf fchk --1k --key test.dic

And I get an empty red table.

Why are 0 keys checked in fast 10 seconds?

I tried for check

hf mf fchk --1k --dic test.dic

and the command gives a response (no error, no data)

So I suppose the check on keys on file is not working.