selected element will not move always

[sun-geo]

Expected behavior

after disconnecting a shared* node with tag (e.g. highway=bus_stop) then the node of the selected element (either way or area) should also used for a potential move afterwards
*shared e.g. with way(highway=tertiary) and area(landuse=residential)

Actual behavior

sometimes the other element is moved (this behavior is annoying and persist for a long time - i was just too lazy to report it... )

steps to reproduce:
0. have two shared elements: e.g. way highway=tertiary (should also happened for highway=* ) and an area of e.g. landuse=residential (should also happened for landuse=* )
0. have a shared node on this structure with tag highway=bus_stop or highway=stop

1. select a shared node (e.g. highway=bus_stop)
2. right mouse click => disconnect
3. select the area (landuse=residential)
4. move the node (highway=bus_stop):
   => the node and line of area (landuse=residential) is modified: OK :-)
5. combine the nodes (highway=bus_stop) of way and area
6. select a shared node (e.g. highway=bus_stop)
7. right mouse click => disconnect
8. select the area (landuse=residential)
9. move the node (highway=bus_stop):
   => the node and line of way (highway=tertiary) is modified: not OK :-(

Screenshots illustrating the current situation

by using the preview.editor.com:

[sun-geo]

ps: please correct/change the issue subject title text for better understanding

[bhousel]

This is #2206