After an upgrade form 3.4 to 3.6, we no longer have these two quiz question behaviours:
qbehaviour_regexpadaptivewithhelp
qbehaviour_regexpadaptivewithhelpnopenalty
The plugins are installed. We just updated them to the latest version as well as the regexp qtype plugim, but still cannot see these two options in the quiz settings. So the setting was switch to "deferred feedback" which is the default.
But in the database, we still have regexpadaptivewithhelp and regexpadaptivewithhelpnopenalty as behaviour.