unable to find nativelib on windows when case-sensitivity mismatch

FULL PRODUCT VERSION :
java version "1.8.0_20"
Java(TM) SE Runtime Environment (build 1.8.0_20-b26)
Java HotSpot(TM) 64-Bit Server VM (build 25.20-b23, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Windows 7 x64
Microsoft Windows [Version 6.1.7601]

EXTRA RELEVANT SYSTEM CONFIGURATION :
Chrome x64

A DESCRIPTION OF THE PROBLEM :
JNLP:

{code:xml}
...
     <resources os="Windows" arch="x86_64">
        <jar href="iaikPkcs11Wrapper-1.3.0.jar" />
        <nativelib href="windows64Wrapper-1.3.0.jar" />
        <property name="jnlp.packEnabled" value="false" />
    </resource>
...
{code}

Log from Java Console:

{code}
basic: JNLP2ClassLoader.findLibrary: Looking up native library: pkcs11wrapper.dll
cache: registerReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@e1ba27c6: 4
cache: Looking up native library in: C:\Users\TF\AppData\LocalLow\Sun\Java\Deployment\cache\6.0\26\440f12da-50a630f0-n\pkcs11wrapper.dll
basic: JNLP2ClassLoader.findLibrary: native library found: null
basic: JNLP2ClassLoader: Native library pkcs11wrapper not found
{code}


The file exists but System.loadlibrary("pkcs11wrapper") ignore files from cache.
If the same DLL file is located in any path from java.library.path everything is ok.

On java (x32):
Java(TM) SE Runtime Environment (build 1.8.0_20-b26)
Java HotSpot(TM) Client VM (build 25.20-b23, mixed mode, sharing)
Everything is also OK!

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1)
JNLP example:

{code:xml}
...
     <resources os="Windows" arch="x86_64">
        <jar href="iaikPkcs11Wrapper-1.3.0.jar" />
        <nativelib href="windows64Wrapper-1.3.0.jar" />
        <property name="jnlp.packEnabled" value="false" />
    </resource>
...
{code}

2) In the java code try to load this library by name (Inside windows64Wrapper-1.3.0.jar there is a signed dll file).


REPRODUCIBILITY :
This bug can be reproduced always.