ListView empty after returning to fragment

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http://stackoverflow.com – I got a FragmentTabHost with 5 tabs and a fragment in each one. One of the fragments contains a ListView. If I push an Activity to the stack and return, the ListView remains the same. If i change tabs and come back to my ListView fragment, the list is empty. My List still exists as it was and the adapter and datasource are exactly the same but the table just isn't drawing. This is my XML <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" (HowTos)