IllegalArgumentException in OTTO when unregistering a fragment

I am using Otto bus to pass events from activity to fragments. The problem is that fragments are manageable ViewPager

and the fragment can be recreated without executing it onPause()

and / or onResume()

. An unpleasant side effect is that when bus.unregister(fragment)

called in onPause()

, the call is intermittently interrupted with an IllegalArgumentException. I also suspect that calls to my annotated method @Subscribe

might be skipped as the call bus.register()

is in onResume()

, which cannot be called either. And unfortunately there is no method bus.isRegistered(fragment)

for safe verification.

Is there a better way to register / unregister a managed ViewPager fragment?

I am aware of this post that discusses a similar setup but does not include snippets running in the ViewPager