When the bogged is attacking he doesn't try to keep distance from the target he is attacking, like java edition, instead he will shoot arrows faster b
Steps to reproduce:
Spawn a bogged
Try to make him attack you or an entity
Expected results:
He will keep distance from the target being attacked
Observed results:
He currently does not do this.
The attack interval issue is tracked at MCPE-178882.
The keeping distance issue is, as you point out, a pre-existing parity issue with skeletons and strays that does not meet the parity issue criteria.