Thanks for catching that! Looking at bug 1705345 it looks like others have hit this similar condition in other cases.
If you run 'plymouth --ping' by itself does it also hang? if so can you grab a strace of that command's output?
Reassigning to plymouth
Other similar bugs: LP: #1606472, LP: #1707197, LP: #1722745, LP: #1723451
Thanks for catching that! Looking at bug 1705345 it looks like others have hit this similar condition in other cases.
If you run 'plymouth --ping' by itself does it also hang? if so can you grab a strace of that command's output?
Reassigning to plymouth
Other similar bugs: LP: #1606472, LP: #1707197, LP: #1722745, LP: #1723451