Pattern matching not work in a right way

[haonguyen1915]

Hi
When I created an aiml like this:

<?xml version="1.0" encoding="UTF-8"?>
<aiml version="2.0">
    <category>
        <pattern>^ hello</pattern>
        <template>
            hello
        </template>
    </category>

    <category>
        <pattern>^ LA AI </pattern>
        <template>something</template>
    </category>

</aiml>

When I typing hello hello -> There is no matching found
But I made a small modify, changing from ^ to * or remove second partern then it works well

<aiml version="2.0">
    <category>
        <pattern>* hello</pattern>
        <template>
            hello
        </template>
    </category>

    <category>
        <pattern>^ LÀ AI </pattern>
        <template>Kinh tom</template>
    </category>

</aiml>

or

<?xml version="1.0" encoding="UTF-8"?>
<aiml version="2.0">
    <category>
        <pattern>^ hello</pattern>
        <template>
            hello
        </template>
    </category>
</aiml>

Please tell me know why? I think it's a bug
Thank you so much!