Any build with single step for Execute Shell crashes the system by spawning infinte processes like "/bin/sh -xe /tmp/hudson283232498517769135.sh"

Steps to reproduce:
1. Create Free-style build
2. Add one build step Execute shell with commands:
echo 'step1'
echo 'step2'
3. Run the build and inspect new processes via top

Note if running similar steps via XShell everything works as expected