Acrobat's bug for Android ~!?

Hi All

I found a bug,

When i use the file commander (ex: ASTRO , FileCommander..)

I try to open a abc.pdf in the \\abc.pdf, File commander call the Acrobat,

Acrobat open the abc.pdf, But Acrobat duplicate a abc.pdf in the Android System Protection Area.

i can't enter in the Android System Protection Area. so i can't search the abc.pdf by File commander.

But Acrobat can search the abc.pdf in the Android System Protection Area.

Is the a bug?