Dragging the map pin of an unselected photo changes the coordinates of the selected photo instead

"I drag an image to a position on the map in the Map unit, the marker consistently appears in a different spot than intended."

This bug, acknowledged by Adobe, has been outstanding for years. It is triggered by running LR on a high-resolution display with Windows Display Scaling set to something other than 100% or LR's Preferences > Interface > Font Size to something other than Automatic (Default).  

The workaround is to select the photos in the filmstrip, right-click the desired map position, and do Add GPS Coordinates To Selected Photos.

"I can then drag the marker to the right spot, but after having performed some more such actions several markers have moved again to different spots on the map."

There are several other longstanding bugs with dragging photos and map pins that Adobe has not acknowledged.  You're probably tripping over this one:

https://community.adobe.com/t5/lightroom-classic-discussions/dragging-the-map-pin-of-an-unselected-photo-changes-the-coordinates-of-the-selected-photo-instead/m-p/12927763

If you can reproduce the problem following the exact steps in that bug report, please add your confirmation to it. That might persuade Adobe to acknowledge the bug and get it submitted into their bug-tracking system.

The bug also occurs in LR 8.4.1 / Mac OS 12.3.1, indicating it is longstanding bug.  I can't test LR 6 because Map is permanently broken in LR 6.

@Rikk Flohr: Photography, how do we make progress on these map bugs?  You're not able to reproduce them, but Bob and I can.  A third person experienced the Add GPS Coordinates To Selected Photos problem (trying to work around the Windows display scaling bug), which is what started me pulling on this long thread. As it stands, it's very hard to work around the Windows display scaling bug when all these other functions don't work.

I wonder what the difference is between your installations and those of Bob and me? I've tested LR 11.3.1 on these installations:

LR 11.3.1, LR 8.4.1, Mac OS 12.3.1, Macbook Pro 15" (15" 2019)

LR 11.3.1, Mac OS 12.1, Macbook M1 Pro 14"

LR 11.3.1, Mac OS 12.3.1, Parallels VM, virgin install of Mac OS and LR

LR 11.3.1, Windows 10, Parallels VM

LR 11.3,1, Windows 11, Parallels VM, virgin install of Windows and LR

and Bob has tested on Mac OS 12.3.1. 

Should I see if I can test on more configurations?  

The diversity of tested installations makes these possible causes unlikley:

- preferences needing resetting

- a mouse hardware or driver problem

- a reinstallation problem

- a Mac- or Windows-specific problem

A wild guess: Perhaps your LR installations are loading different versions of the Google Maps API, perhaps as the result of an environment variable set on Adobe computers.