TopComponent memory leakage?

Hello.

I'm facing a problem that can easily be reproduced using the Paint App 
sample application(File, New Project, Samples/NetBeans Modules/Paint 
Application) . I add
<code>
byte test[] = new byte[1024*1024*50]; //50 megabytes
</code>
in PaintTopComponent.java just to easily see the memory leakage.

If I open and close 10 or more windows, there are still live objects in 
memory even after calling garbage collector several times. Sometimes the 
PaintTopComponent object is collected but its resources not. If i keep 
opening and closing windows, the number of live objects in memory 
increases and never get collected. I tested using Windows 7 and Windows 
10 with Netbeans 8.2, JDK 8 upd 111 and openJDK 1.8. See image for details.

PS: This problem DOESN'T happen when using Ubuntu 16.04.1 LTS with 
Netbeans 8.2 and openJDK 1.8. I couldn't test using MAC OSX.

Any thoughts?

Thanks in advance.