A way to reproduce the problem is to create annotations using "macros" in SW.
Actually, I've created a simple cube in 3d part and recorded a new macro while inserting manually a new annotation (note "Manual" in snapshot).
Then I played the recorded macro to insert automatically another annotation (by just modifying its name to "Auto"). As shown in the enclosed screenshot, both notes have correctly the same leader attachment location, but weirdly don't have the same position, although the setposition coordinates are intact.
The created cube "CubeWithFdtManuel.sldprt" and the recorded macro "Macro1.swp" are attached to this message.
Thanks in advance for your reply.