Good day. There's apparently been a change in window positioning behavior in version 17. When multiple FileMaker windows are open (these can be additional windows from the same database or windows from different databases), there's a shift of window position when windows are restored from the Dock. To reproduce the issue:
1) Create a new window (so at least two are open).
2) Move the newly created window to a different position.
3) Minimize the newly created window.
4) Restore the newly created window.
The original window will jump to the upper left corner of the screen, stacked with any other FileMaker windows that are already in or near that position.
Please see related Community thread at Window positioning in 17.