With AnchorDockingDsgn, can't close cloned source editor

[bpranoto]

With lazarus ide compiled with AnchorDockingDsgn, I cannot delete cloned source editor. Pressing the Close control button just brings to back the windows, but the cloned source editor still exists

On plain ide without AnchorDockingDsgn, the cloned source editor can be closed.

Do I meet a bug or I miss something?

Lazarus 2.0.10
fpc 3.2.10
o/s: ubuntu 18.04 64bits.

[Peter H]

I have sen this before with anchordockingdesign on older lazarus versions.
Now I use Lazarus trunk 64 bit and tried again: Same problem.
When a cloned window is closed via button or menu, it goes to background but still exists in the windows list, it is not closed.
So far I remember, this is persistent after restarting Lazarus.

[bpranoto]

Thank you for confirming. I have put a bug report: https://bugs.freepascal.org/view.php?id=38296