Objects and Intransitive Uses in the Source

Seven Semantic Functions of Form VI (Tafāʿul): Reciprocity, Multiplicity, Pretence, Response, Equivalence, and Independent Uses

The source examples display more than one syntactic pattern:

ExpressionSubjectDirect object
تَشَاتَمَ زَيْدٌ وَعَمْرٌوZayd and ʿAmrNone expressed
تَرَافَعَا شَيْئًاDual subject endingshayʾan
تَمَارَضَ زَيْدٌZaydNone expressed
تَبَاعَدَImplicit 'he'None expressed

Therefore, the form cannot simply be called invariably transitive or invariably intransitive. Transitivity must be judged from the verb's use and the object relationship in the particular sentence.