Solaris 11.3 bug/oddity with remote zonecfg in loop

zonecfg-loop-bug.txt

Consider this script on Solaris 11.3:

#!/bin/ksh93
echo "a\nb\nc" | while read val; do
  echo "$val :"
  ssh -q remotehost "zonecfg -z azone \"select capped-memory; end;\""
done

When run, it will only execute the first iteration of the loop:

$ ./script.sh
a :
$

BUT! It will work and run through every iteration if you use "ssh -n" instead (i.e. redirect /dev/null to stdin).
Theory: zonecfg reads from stdin every time, which interacts badly within a non-interactive shell (absorbs rest of loop input?).