Opening a DM thread's details from the thread header: the shared-links query
and the collections list are sent while the thread is still in front, then
the details screen comes to front and the profile updates, both shared-media
pages and the sharing info are requested. The shared-media screen comes to
front after those requests, as the app does (its data is prefetched while the
details screen is shown). The app records one more screen between the thread
and the details (the chain's ordinal jumps by two); no request names that
screen, so it is not invented and the journey's ordinals stay continuous.
Opening a DM thread's details from the thread header: the shared-links query and the collections list are sent while the thread is still in front, then the details screen comes to front and the profile updates, both shared-media pages and the sharing info are requested. The shared-media screen comes to front after those requests, as the app does (its data is prefetched while the details screen is shown). The app records one more screen between the thread and the details (the chain's ordinal jumps by two); no request names that screen, so it is not invented and the journey's ordinals stay continuous.