I have also had a host of problems with 17.1.1. Audio sync actions don’t fire at all.
With the test, if you want to have something that submits the test, try taking your questions and put them all in one test section. Then create a second test section with a single page that has no question on it. Just put the submit button on it. Turn off randomization at the test level and set the randomize option on the first test section. Lectora should randomize from the first test section and then go to the single page in the second section. The submit button with a process test action should work. Just remember to set question numbering at the test section level not the test level and then don’t show a question number on the second section.