qsTr() does not work with javascript libraries

I am trying to translate some strings from a .js library imported by my QMLs, the strings are found by lupdate but when I launch my app the qsTr function cannot find the translated string but it works with the strings in the QML files.

Javascript “file.js”

    function func() {
        var temp = qsTr("TEST")
        return temp
    }

QML

    import "file.js" as JSLIB
     
    Text{
            text: JSLIB.func()
        }

I have add some logs in qsTr() function in qtdeclarative/src/qml/qml/v8/qqmlbuiltinfunctions_p.h. The problem is qsTr() is looking the tag in a context with the file basename less the last character for .js files. I have modified manually the .ts file and it works:

Old .ts generated by lupdate (NO WORKING):

...
<context>
    <name>file</name>
...

New .ts modified manually (WORKING):

...
<context>
    <name>fil</name>
...