Yes that is normal behavior, you need to read the help file for the /flg=2 parameter, or use the new and superior /feed parameter which has been added in more recent versions.
OLD WAY: XYplorer.exe /script="::focus 'P2'" /flg=2
NEW WAY: XYplorer.exe /feed="::focus 'P2'"
This is not a bug, and I will move this topic once you reply.