Filtering in filesets in multimodule build does not work

I have multimodule build. One child is using
<fileSet>
<directory>MyDir</directory>
<outputDirectory>/bin/</outputDirectory>
<fileMode>0755</fileMode>
<filtered>true</filtered>
</fileSet>

This works fine when I build just this child. But when child is being built in multimodule build , files are not filtered.
I am sure(using -X) in single module build and in multi module build, same version(2.2-beta-2) of asembly plugin is used.

Workaround is to again use individual <files> ... </files> like in 2.2-beta-1