https://www.openstreetmap.org/node/4592378548 represents the stop position of trains for public transport relations mapped according to the so called PTv2 (public transport version 2 = https://wiki.openstreetmap.org/w/index.php?title=Proposed_features/Public_Transport&oldid=625726 )

The node is part of a stop_area and a route relation of the RE6, both with role 'stop'. 

https://www.openstreetmap.org/node/4278583112 is, from the PTv2 perspective the same, a stop position for trains

according to https://wiki.openstreetmap.org/wiki/OpenRailwayMap/Tagging#Car_shuttle it shouldn't be mapped as railway=halt but rather as railway=car_shuttle a transfer point

But many mappers are not familiar with the details of railway= mapping - me included.
