Hi,

What does  perl -V produce? I've got a hunch that maybe https://metacpan.org/source/JWB/Proc-ProcessTable-0.53/hints/solaris.pl might be affecting "handshake" by removing those flags, so try neutering solaris.pl

You might try the dev version from https://github.com/jwbargsten/perl-proc-processtable/archive/master.zip

Also mention this thread to the dev ( rt://Proc-ProcessTable )