I just published a SL module that has three sections of questions - the first 15 are T/F, the other two are multiple choice.
When I preview the T/F scene everything works.
When I publish the T/F scene does not work - I cannot select the correct answer and hit submit (nothing happens). If I select the wrong answer and hit submit, I get my incorrect feedback. There is no correlation between True or False answers not working (i.e., doesn't matter what the answer is, it doesn't work).