We ironed out the problems with Poodll Feedback on Moodle 3.3 and there are new versions of the Poodll filter and of the Poodll feedback modules in Moodle.org now.
Note that Poodll feedback needs to be enabled in the feedback settings in the assignment.
And you should probably check that the “current feedback” is displayed on the feedback form for the teacher’s benefit. This is the default setting, and can be found at:
site administration -> plugins -> activity modules -> assignment -> feedback plugins-> feedback poodll