In Passolo 2016, an incremental (and occasionally random) integer is added to the value of each <tu tuid="nnnn"/> element.

If I have an XML resource like this:

<phrase i="myStringId" t="This is an example string."/>

I expect the resulting TMX resource to look like this:

<tu tuid="myStringId" segtype="phrase">
 <tuv xml:lang="en-GB" creationid="PASSOLO">
 <seg>This is an example string.</seg>
</tuv>
<tuv xml:lang="de-DE" creationid="PASSOLO">
 <seg>Dies ist eine Beispielzeichenfolge.</seg>
</tuv>
</tu>

However, the following is exported and tuid ends up being something like 4021:

<tu tuid="4021" segtype="phrase">
 <tuv xml:lang="en-GB" creationid="PASSOLO">
 <seg>This is an example string.</seg>
</tuv>
<tuv xml:lang="de-DE" creationid="PASSOLO">
 <seg>Dies ist eine Beispielzeichenfolge.</seg>
</tuv>
</tu>

Why is it rendered as tuid="4021" instead of tuid="myStringId"?