[Lazarus] I found an AnchorDockingDsgn package bug?

[leyba bronstain]

Hi.

After installing the AnchorDockingDsgn package for Win7 x64, I noticed a 
strange IDE behavior. If you dock any other window to the Source Code 
Editor in the manner shown in the figure, then it becomes impossible to 
close any tab of the Source Code Editor using the mouse (using the 
shortcuts, the tab is closed correctly). It's a bug?

See more here: 
https://forum.lazarus.freepascal.org/index.php/topic,45728.0.html

With best regards, Zoltanleo