Are you dragging and dropping the piece? If you are then I recommend clicking on the piece and clicking on the square where you want to move that piece. This way there is fewer mouse slips.
Problem is it takes a little longer that way. Before it was click-move-release, and now it's click-release-move-click-release.
When I try to move a chess piece, it often falls short and/or it's hard to grab and move. I can no longer play blitz because of slipped moves. (may be a good thing?)
Anyway, is this my mouse problem? Need a new mouse or something else? Thanks for help.